Worry is a total waste of time. It doesn't change anything. All it does is steal your joy and keeps you very busy doing nothing. Source: Internet
And you can also commit injustice by doing nothing. Marcus Aurelius
Doing nothing is happiness for children and misery for old men. Victor Hugo
There's no life so tiring as one of doing nothing. Mexican Proverb
Better to walk without knowing where than to sit doing nothing. Tuareg Proverb
Doing nothing is doing ill. German Proverb