We see only what we know.

The light is there, and colors surround us. However, if there were no light nor colors in our own eye, we wouldn't perceive such things outside of us.

The traveler was active; he went strenuously in search of people, of adventure, of experience. The tourist is passive.

Sceptics are yet the most credulous.

Give me the benefit of your convictions, if you have any; but keep your doubts to yourself, for I have enough of my own.

A leaf that is destined to grow large is full of grooves and wrinkles at the start. Now if one has no patience and wants it smooth offhand like a willow leaf, there is trouble ahead.

An absent friend gives us friendly company when we are well assured of his happiness.