Of all people only those are at leisure who make time for philosophy, only those are really alive. For they not only keep a good watch over their own lifetimes, but they annex every age to theirs . . . Unless we are very ungrateful, all those distinguished founders of holy creeds were born for us and prepared for us a way of life. By the toil of others we are led into the presence of things which have been brought from darkness into light. We are excluded from no age, but have access to them al…