"Therefore we ought to love all our dear ones, both those we desire to outlive us by condition of their birth, and those who themselves pray most justly to pass away before us, but always in the realization that we have received no promise that they will be ours for ever, no, not even ours for a length of time." Seneca, Consolation for Marcia.
As long as you think "I am doing this" or "I have to do this",
or "I have to obtain something", you are actually not doing anything.
Shunryu Suzuki, Zen Mind.
Knowing that your life is short, to enjoy it day after day, moment after
moment, is the life of "form is form" and "emptiness is emptiness".
Shunryu Suzuki, Zen Mind.
"Let us grant to our soul that peace which will be provided by constant study of beneficial instruction, by noble actions, and a mind fixed on desire only for what is honourable." Seneca, On Anger.