The Five Remembrances of the Buddha

"I am of the nature to grow old. There is no way to escape growing old. I am of the nature to have ill health. There is no way to escape having ill health. I am of the nature to die. There is no way to escape death. All that is dear to me and everyone I love are of the nature to change. There is no way to escape being separated from them. My actions are my only true belongings. I cannot escape the consequences of my actions. My actions are the ground on which I stand." - (Pali Canon, AN 5.57)