is awareness. The opposite of mindfulness is ignorance. Ignorance that everything - including us humans - is impermanent.
Feelings - pleasant, unpleasant, neutral - are impermanent.
Perceptions - believing that things are permanent, believing that there is a self - are impermanent.
Physical presence - birth, existence, age, death - is impermanent.
Mental states - fear, anger, hatredm arrogance, jealousy, greed - are all sources of suffering because they all arise due to ignorance.
Once we look deep inside us, no matter how painful it may be, and realize the cause of these mental states, the ignorance about them is removed, and we will be liberated from them and feel free in our heart.
We cover the reality with all kinds of things, little realizing that the reality is that everything is impermanent and therefore, will pass.
The Buddha said: To accept life means to accept impermanence and emptiness of self. The source of suffering is a false belief in permanence and the existence of separate selves. Thus, one understands that there is neither birth nor death, production nor destruction, one nor many, inner nor outer, large nor small, impure nor pure. All such concepts are false distinctions created by the intellect.
Thus, once we understand, accept, and believe in the impermanence of everything, we will be free from the suffering that all these cause us...