Alchemy of Happiness

God has sent on Earth a hundred and twenty-four thousand prophets to teach men the prescription of this alchemy, and how to purify their hearts from baser qualities in the crucible of abstinence. This alchemy may be briefly described as turning away from the world, and its constituents are four: Knowledge of Self, Knowledge of God, Knowledge of this world as it really is, Knowledge of the next world as it really is. More info here