All men have a reason, but not all men can give a reason.

In this world no one rules by love; if you are but amiable, you are no hero; to be powerful, you must be strong, and to have dominion you must have a genius for organizing.

God has created me to do Him some definite service; He has committed some work to me which he has not committed to another, I have my mission ... He has not created me for naught ... If I am in sickness, my sickness may serve Him; If I am in sorrow, my sorrow may serve Him. He does nothing in vain. He knows what He is about.

A science is not mere knowledge, it is knowledge which has undergone a process of intellectual digestion. It is the grasp of many things brought together in one, and hence is its power; for, properly speaking, it is Science that is power, not Knowledge.

To discover and to teach are distinct functions; they are also distinct gifts, and are not commonly found united in the same person.

Reason is God's gift, but so are the passions. Reason is as guilty as passion.

Egotism is true modesty. In religious enquiry each of us can speak only for himself.