It is our attitude at the beginning of a difficult task which, more than anything else, will affect its successful outcome.

A great idea goes through three stages on its way to acceptance: 1) it is dismissed as nonsense, 2) it is acknowledged as true, but insignificant, 3) finally, it is seen to be important, but not really anything new.

The deepest longing in the human breast is the desire for appreciation.

...By far the most usual way of handling phenomena so novel that they would make for a serious rearrangement of our preconceptions is to ignore them altogether, or to abuse those who bear witness for them.

The one who thinks over his experiences most, and weaves them into systematic relations with each other, will be the one with the best memory.

Nature in her unfathomable designs had mixed us of clay and flame, of brain and mind, that the two things hang indubitably together and determine each other's being but how or why, no mortal may ever know.

Habit is a second nature, or rather, it is 'ten times nature'.