The consequences of a plethora of half-digested theoretical knowledge are deplorable.

Mathematics, in its widest significance, is the development of all types of formal, necessary, deductive reasoning.

Religion is the last refuge of human savagery.

The result of teaching small parts of a large number of subjects is the passive reception of disconnected ideas, not illumed with any spark of vitality.

What we perceive as the present is the vivid fringe of memory tinged with anticipation.

Not ignorance, but ignorance of ignorance, is the death of knowledge.

Ideas won't keep. Something must be done about them.