Quote from : The Garden of Epicurus Book

Ignorance is the necessary condition, i do not say of happiness, but of life itself. If we knew everything, we could not endure existence a single hour. The sentiments that make it sweet to us, or at any rate tolerable, spring from a falsehood, and are fed on illusions. If, like God, a man possessed the truth, the sole and perfect truth, and once let it escape out of his hands, the world would be annihilated there and then, and the universe melt away instantly like a shadow.