of being strong and brave. The strong can not be brave. Only the weak can be brave; and yet again, in practice, only those who can be brave can be trusted, in time of doubt, to be strong.
Only two kinds of people can attain self-knowledge: those who are not encumbered at all with learning, that is to say, whose minds are not over-crowded with thoughts borrowed from others; and those who, after studying all the scriptures and sciences, have come to realise that they know nothing.