The great creative individual . . . is capable of more wisdom and virtue than collective man ever can be.

The doctrine called Philosophical Necessity is simply this: that, given the motives which are present to an individual's mind, and given likewise the character and disposition of the individual, the manner in which he will act might be unerringly inferred: that if we knew the person thoroughly, and knew all the inducements which are acting upon him, we could foretell his conduct with as much certainty as we can predict any physical event.

The idea that truth always triumphs over persecution is one of those pleasant falsehoods, which most experience refutes. History is teeming with instances of truth put down by persecution. If not put down forever, it may be set back for centuries.

[A] man and still more the woman, who can be accused either of doing "what nobody does," or of not doing "what everybody does," is the subject of as much depreciatory remark as if he or she had committed some grave moral delinquency.

If religious belief be indeed so necessary to mankind, as we are continually assured that it is, there is great reason to lament, that the intellectual grounds of it should require to be backed by moral bribery or subornation of the understanding.

Each undervalues that part of the materials of thought with which he is not familiar.

The application of algebra to geometry ... has immortalized the name of Descartes, and constitutes the greatest single step ever made in the progress of the exact sciences.