Justice. Robert Green Ingersoll.

Justice is the only worship.
Love is the only priest.
Ignorance is the only slavery.
Happiness is the only good.
The time to be happy is now,
The place to be happy is here,
The way to be happy is to make others so.
Wisdom is the science of happiness.

From Robert Green Ingersoll.

(image from commons.wikimedia.org)