Historically, fever was wrongly treated as a disease to be suppressed. We now see it as a healthy immune response. This reframes depression not as a flaw, but as a potentially adaptive, though painful, response from our evolutionary drive to survive and flourish.

From an evolutionary perspective, low mood isn't a malfunction. It is an adaptive signal that forces an organism to pause when facing an uncertain or unpromising situation. It compels a reconsideration of the current strategy to ensure long-term survival and flourishing.

Those experiencing depression may have a more accurate view of the world, a phenomenon called "depressive realism." While a good mood often relies on positive illusions that ignore hard truths like mortality, a low mood forces a person to confront these difficult realities.

Shift the focus of mental health from coping and feeling comfortable to building the capacity to handle life's challenges. The goal isn't to feel better, but to become a better, more resilient person through difficult experiences.

Contrary to the classic theory of "learned helplessness," recent neuroscience suggests passivity is the brain's default response to prolonged adversity. What we actually learn is mastery—the sense of control that overrides this default. This reframes depression as a failure to learn capability, not a learned state of helplessness.

The capacity for profound joy from simple things is intensified by having experienced life's hardships. Grief provides the necessary contrast that transforms tender moments from being merely "nice" into feeling "life-saving" and deeply meaningful.

Contrary to the dominant medical model, mental health issues like depression and anxiety are not illnesses. They are normal, helpful responses that act as messengers, signaling an underlying problem or unresolved trauma that needs to be addressed rather than a chemical imbalance to be suppressed.

Experiencing a true life tragedy, such as losing a spouse, fundamentally recalibrates one's perspective. It creates a powerful mental filter that renders materialistic envy and minor daily frustrations insignificant. This resilience comes from understanding the profound difference between a real problem and a mere inconvenience.

A truly happy life doesn't mean avoiding all pain. Certain forms of stress and suffering, like difficult exercise, are integral to achieving deeper well-being. By providing contrast and building resilience, these negative experiences can increase one's total happiness over the long term.