I sometimes think that God in creating man somewhat overestimated his ability.

Wherever you go, whatever you do, be in love.

Our best thoughts come from others.

All the forces in the world are not so powerful as an idea whose time has come.

Science is properly more scrupulous than dogma. Dogma gives a charter to mistake, but the very breath of science is a contest with mistake, and must keep the conscience alive.

Change in all things is sweet.