The mind is the source of happiness and unhappiness.

Dharma Wheel and Noble Eightfold Path

Tame the mind. This is the greatest challenge before you. It rushes here and there, swifter than the wind, more slippery than water. If you can arrest the flights of the mind to your will, happiness will be assured to you.

The wise man takes great care to guard his thoughts. They are very subtle, very difficult to perceive and slip out of control at the tinniest opportunity. A well guarded mind brings happiness.

We are shaped by our thoughts; we become what we think. When the mind is pure, joy follows like a shadow that never leaves.

To enjoy good health, to bring true happiness to one's family, to bring peace to all, one must first discipline and control one's own mind. If a man can control his mind he can find the way to Enlightenment, and all wisdom and virtue will naturally come to him.

All that we are is the result of what we have thought. If a man speaks or acts with an evil thought, pain follows him. If a man speaks or acts with a pure thought, happiness follows him, like a shadow that never leaves him.

The Tao of Happiness

Let the wise guard their thoughts, which are difficult to perceive, extremely subtle, and wander at will. Thought which is well guarded is the bearer of happiness.

If you keep thinking of all the way in which others cheated you, fought with you, degraded you or angered you, your heart will forever be full of hatred. Learn to let go, and be happy.

Meditate. Live purely. Be quiet. Do your work with mastery. Like the moon, come out from behind the clouds! Shine.

He who is seeking his own happiness and who punishes those who also long for happiness is running after a chimera. No happiness shall come his way for having destroyed that of others.

Thousands of candles can be lighted from a single candle, and the life of the candle will not be shortened. Happiness never decreases by being shared.

The wise man knows that the earnestness is the most beautiful jewel in his crown. His happiness is not marred. It is the only jewel which gains in beauty with every passing day, where diamonds and rubies lose their gloss with every passing day.

The earnest person is like fire. Fire burns away everything big or small. The Greatest man and the smallest are equally consumed by fire. The fire of earnestness demolishes all the vanities, passions and terrors of life.

The Wheel of Life in Buddhism

The good man should not tire of his good deeds. Till their fruit ripens, he may have to suffer bad times. But once the good deeds ripen, his life is suffused with happiness.

Though a man may strive, a knowledge will not be perfect while fear and worries cloud his mind. While perplexity robs his mind of peace, his knowledge will not forth the perfume of happiness.

If a man who enjoys a lesser happiness beholds a greater one, let him leave aside the lesser to gain the greater.