“If you work at that which is before you, following right reason   seriously, vigorously, calmly, without allowing anything else to distract   you, but keeping your divine part pure, as if you should be bound   to give it back immediately; if you hold to this, expecting nothing,   fearing nothing, but satisfied with your present activity according   to nature, and with heroic truth in every word and sound which you   utter, you will live happy. And there is no man who is able to   prevent this.”