Mental Health Basics

Mental health, though negatively having a negative stigma surrounding it, is defined as your emotional, psychological, and social well-being. It affects how we think, feel, and act, determining our way of life. (source)

The term "illness," when addressing mental health brings negativity to helping your mental state, whereas "health" brings a positive connotation to the term. 

Health: Helping yourself and others increase overall well-being. 

Illness: A sickness or disease that cannot be cured.