The proper function of man
The proper function of man is to live, not to exist. I shall not waste my days in trying to prolong them. I shall use my time. ~ Jack London
use
Make the best use
Make the best use of what is in your power and take the rest as it happens. ~ Epictetus
The greatest use of life
The greatest use of life is to spend it for something that will outlast it. ~ William James