He who opens a school door, closes a prison.

Solitude either develops the mental power, or renders men dull and vicious.

Love each other dearly always. There is scarcely anything else in the world but that: to love one another.

The hand which moves over the dial moves also among souls.

There is but one way of refusing To-morrow, that is to die.

Astronomy, that micography of heaven, is the most magnificent of the sciences. ... Astronomy has its clear side and its luminous side; on its clear side it is tinctured with algebra, on its luminous side with poetry.

We must never fear robbers or murderers. They are dangers from outside, small dangers. It is ourselves we have to fear. Prejudice is the real robber, vice the real murderer. Why should we be troubled by a threat to our person or our pocket? What we have to beware of is the threat to our souls'.