What ought a man be? Well, my short answer is 'himself'.
Really to sin you have to be serious about it.
Each bird must sing with his own throat.
Happiness is worth a daring deed; we are both free if we but will it, and then the game is won.
Look into any man's heart you please, and you will always find, in every one, at least one black spot which he has to keep concealed.
The strong must learn to be lonely.