A traveller without observation is a bird without wings.

Whoever has his foe at his mercy, and does not kill him, is his own enemy.

He who learns the rules of wisdom, without conforming to them in his life, is like a man who labored in his fields, but did not sow.

However much you are read in theory, if thou hast no practice thou art ignorant.

A man is insensible to the relish of prosperity till he has tasted adversity.

The rose and the thorn, and sorrow and gladness are linked together.

Whenever you argue with another wiser than yourself in order that others may admire your wisdom, they will discover your ignorance.

Of journeying the benefits are many: the freshness it bringeth to the heart, the seeing and hearing of marvelous things, the delight of beholding new cities, the meeting of unknown friends, and the learning of high manners.