If anyone is unhappy, remember that his unhappiness is his own fault... Nothing else is the cause of anxiety or loss of tranquility except our own opinion.

We cannot choose our external circumstances, but we can always choose how we respond to them.

Anything worth putting off is worth abandoning altogether.

Authentic happiness is always independent of external conditions.

What is yours is to play the assigned part well. But to choose it belongs to someone else

The good or ill of a man lies within his own will.

The universe is but one great city, full of beloved ones, divine and human, by nature endeared to each other.