There are three principal means of acquiring knowledge... observation of nature, reflection and experimentation. Observation collects facts; reflection combines them; experimentation verifies the result of that combination.
- Denis Diderot
Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom.
- Charles Spurgeon
Knowledge of the self is the mother of all knowledge. So it is incumbent on me to know my self, to know it completely, to know its minutiae, its characteristics, its subtleties, and its very atoms.
- Khalil Gibran