Mental health includes emotional, psychological, and social well-being. It affects cognition, awareness, and behavior. It also determines how an individual levers stress, social relationships, and decision-making. Mental health comprises subjective well-being, professed self-efficacy, autonomy, capability, intergenerational dependence, and self-actualization of one's intellectual and emotional potential, among others. From the viewpoints of positive psychology or holism, mental health may include an individual's ability to enjoy life and to create a balance between life activities and efforts to achieve psychological resilience. Cultural differences, subjective valuations, and competing professional theories all affect how one defines "mental health".