To know where a thing is we must have found it.

I let everyone follow his own bent, that I may be free to follow mine.

Let there be truth between us.

The one who acts is always without conscience; nobody has a conscience but the contemplative person.

Progress has not followed a straight ascending line, but a spiral with rhythms of progress and retrogression, of evolution and dissolution.

Science and art belong to the whole world, and before them vanish the barriers of nationality.

Were not the eye made to receive the rays of the sun, it could not behold the sun; if the peculiar power of God lay not in us, how could the godlike charm us?