To have a better life we must keep choosing how we are living.
Failure is only postponed success as long as courage 'coaches' ambition.
Gradually the conviction gained recognition that all knowledge about things is exclusively a working-over of the raw material furnished by the senses. ... Galileo and Hume first upheld this principle with full clarity and decisiveness.
All men are ignorant, just in different fields.
The physicist's greatest tool is his wastebasket.
A problem cannot be solved at the level of consciousness in which it occurs.