What Causes Depression? A Clinical and Christian Perspective

Depression is one of the most widely experienced, yet often misunderstood, human struggles. Most people have some awareness of what depression looks like. We recognise it in others. We may have experienced aspects of it ourselves. Yet when it comes to understanding why it happens, the explanations are often incomplete.

As both a clinical psychologist and a Christian, I have found that one of the most important starting points to fixing depression is to first understanding it.

There is a principle reflected in Scripture that speaks to this: “My people are destroyed for lack of knowledge” (Hosea 4:6). While often quoted broadly, the principle remains relevant. When we do not understand something, we are far more likely to respond to it incorrectly.

Depression is not simple. And therefore, it requires a careful and thoughtful understanding.

We as humans have several dimensions to our being. We are body, mind, spirit, have relationships, finances, do jobs and are part of a community. Depression is caused and treated by factors in these areas and mostly not just by a single factor. It is best understood as a response that affects the whole person.

Clinically, we often describe this through what is known as the bio-psycho-social model. As Christians, we would add the spiritual dimension to this.

This means depression is shaped by:

These are not separate categories. They are interconnected. What happens in one area influences the others. Let’s take a look at the various areas and where depression could originate.

In my own life I have experienced times of depression. I will use myself as an example.

Depression has a real physical component. It involves processes within the brain and body, including neurochemistry, genetic vulnerability, hormonal changes and physical health conditions.

In some cases, there is a strong biological contribution. This is why medical support, including medication, can be appropriate and helpful for certain individuals. However, it is important not to reduce depression purely to biology. While the body plays a role, it does not explain the full picture.

In my own life I experienced the direct impact of my physical health on my mood. A lack of sufficient exercise, poor diet and underlying illnesses contributed to me not living optimally.

Our internal world plays a significant role in depression. This includes how we think, interpret events, view ourselves, and cope with stress. How we think directly affects our feelings and behaviour.

Certain thinking patterns, developed over long periods of time, can deepen and sustain depression, such as interpreting situations in a way that is unhelpful. A few examples are the way we see difficult circumstances. We could assume the worst outcomes, leading to panic and hopelessness; or when we are challenged to perform see ourselves as less than we really are, leading to fear and uncertainty or when change happens and we have rigid expectations of how life should work and struggle to adapt, leading to frustration.

Other unhelpful thinking habits are seen in how one views relationship dilemmas – either solely as others’ fault or seeing your share in interactions and having empathy for the other person’s point of view. If you see the former, you will feel angry and victimised and consequently depressed. The latter will empower you to see how we influence each other and possibly lead to change and hope. All these intense feelings contribute to your inner experience of life.

These patterns often form gradually and begin to feel like truth, even when they are not fully accurate. Over time, this way of thinking can shape how a person experiences both themselves and the world around them.

We do not live our lives in isolation. Our environments and relationships matter deeply and directly affect our inner experience. The ‘systems’ we function in (work, family etc.) envelop and impacts us.

We are further defined by our relationships e.g. I am a husband. This is a definition of one of my roles within a relationship. Without another person, this role would not make sense. The nature and quality of that relationship influences your wellness.

Depression also signifies sadness at losing something of value. If you lose people, roles or relationships or these have unresolved conflict, it touches you.

Depression is often a result of loneliness and isolation (not having your relationship needs met), trauma or abuse (the relational place that should have been safe became dangerous and hurt you instead), ongoing stress and pressure and major life transitions (helplessness experienced due to overwhelming challenges from your environment putting pressure on your ability to cope).

Even positive changes can bring significant strain. Marriage, parenting, or career shifts can introduce new demands that feel overwhelming. A lack of meaningful support can increase vulnerability. Conversely, healthy, supportive relationships can play a vital role in recovery.

Depression is not only influenced by certain factors. It is also maintained by a pattern.

Out of sheer desperation to cope, a person may begin to:

This effort to cope leads to further withdrawal and reduced activity, which reinforces the depression. Over time, this becomes a self-perpetuating cycle.

Understanding this is important, because it shows that depression is not fixed. It is a process, and processes can be interrupted and changed.

Within Christian contexts, depression is often misunderstood. Some assume it is purely spiritual and demonic. Others dismiss the spiritual dimension altogether. Both approaches are incomplete. Not all depression is spiritual in origin. At the same time, spiritual factors should not be ignored.

Scripture gives a far more honest picture. Many faithful individuals experienced deep emotional distress like King David who speaks of despair and inner turmoil, Elijah who felt overwhelmed and wanted to give up and Paul who described seasons of intense pressure and discouragement. Even Christ Himself experienced profound anguish before His crucifixion. Depression, therefore, cannot simply be reduced to a lack of faith.

A balanced Christian perspective requires discernment. In some cases, struggles such as guilt, shame, distorted beliefs about God and unresolved bitterness may contribute to a person’s emotional state. In other cases, depression may be primarily biological, psychological, or situational.

Wisdom lies in recognising that different individuals require different forms of support. A simplistic, one-dimensional explanation often does more harm than good.

Scripture offers hope. In Isaiah 61, we see God’s heart to bring “beauty instead of ashes… the oil of joy instead of mourning… and a garment of praise instead of a spirit of despair.”

God’s grace in Christ gives says “I am with you no matter what”, “You are loved no matter what”, and “Come to Me, I will help you and work all things out for your good and My glory”. This does not deny suffering. It speaks to God’s redemptive work within it.

When we feel overwhelmed and stuck, it can alter how one sees everything, yourself, others, and the future. It can create a sense that things will not change. However, perspective matters.

The experience of depression, while powerful, is not the full reality of your situation. It is one part of it. Scripture reminds us that “the Lord upholds all who fall and lifts up all who are bowed down” (Psalm 145:14). God is there, ready to comfort and help. This does not remove the struggle immediately, but it anchors us in the truth of His loving presence and faithfulness while walking through the dark valleys.

Depression is far more common than many realise. It affects people across all backgrounds, including those who are capable, successful, and outwardly strong. It is not a sign of weakness. It is not a personal failure. It is a complex human response within a complex world. Understanding depression does not solve it instantly, but it provides clarity and clarity creates direction.

Depression is not caused by a single factor, and it cannot be addressed through a single solution. It is a whole-person experience, shaped by biological, psychological, social, and spiritual influences. Understanding these dimensions is the first step towards responding wisely and effectively.

In the next article, we will look at how to begin responding to depression in practical, structured ways, both clinically and biblically.