The heart has its order, the mind has its own, which uses principles and demonstrations. The heart has a different one. We do not prove that we ought to be loved by setting out in order the causes of love; that would be absurd.

Nothing is more dastardly than to act with bravado toward God.

The eternal silence of these infinite spaces frightens me.

If you do not love too much, you do not love enough.

The last function of reason is to recognize that there are an infinity of things which surpass it.

Those honor nature well, who teach that she can speak on everything...

Not the zeal alone of those who seek Him proves God, but the blindness of those who seek Him not.