Of what use, however, is a general certainty that an insect will not walk with his head hindmost, when what you need to know is the play of inward stimulus that sends him hither and thither in a network of possible paths?

Imagination is a licensed trespasser: it has no fear of dogs, but may climb over walls and peep in at windows with impunity.

Say "I love you" to those you love. The eternal silence is long enough to be silent in, and that awaits us all.

Men outlive their love, but they don’t outlive the consequences of their recklessness.

Whether happiness may come or not, one should try and prepare one's self to do without it.

... learning to love any one is like an increase of property, -- it increases care, and brings many new fears lest precious things should come to harm.

there are two ways of speaking an audience will always like: one is, to tell them what they don't understand; and the other is, to tell them what they're used to.