Grace is always sufficient, provided we are ready to cooperate with it. If we fail to do our share, but rather choose to rely on self-will and self-direction, we shall not only get no help from the graces bestowed on us, we shall actually make it impossible for further graces to be given.

[I am not] the captain of my soul; I am only its noisiest passenger.

The lion will lay down with the lamb...but every morning they'll have to provide a new lamb. Maybe this world is another planet's hell.

That’s what the human brain is there for—to turn the chaos of given experience into a set of manageable symbols. Sometimes the symbols correspond fairly closely to some of the aspects of the external reality behind our experience; then you have science and common sense. Sometimes, on the contrary, the symbols have almost no connection with external reality; then you have paranoia and delirium. More often there’s a mixture, part realistic and part fantastic; that’s religion.

Cynical realism is the intelligent man's best excuse for doing nothing in an intolerable situation.

Some of the greatest advances in mathematics have been due to the invention of symbols, which it afterwards became necessary to explain; from the minus sign proceeded the whole theory of negative quantities.

The secret of genius is to carry the spirit of the child into old age, which mean never losing your enthusiasm.