The Five Remembrances - The Upajjhatthana Sutta.

1 I am of the nature to grow old. There is no way to escape growing old.

2 I am of the nature to have ill health. There is no way to escape having ill health.

3 I am of the nature to die. There is no way to escape death.

4 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.

5 My actions are my only true belongings. I cannot escape the consequences of my actions. My actions are the ground upon which I stand.

Subjects worthy of Contemplation.
The Buddha.