Reason is a crutch for age, but youth is strong enough to walk alone.

The sooner you treat your son as a man, the sooner he will be one.

Or hast thou known the world so long in vain?

What, start at this! when sixty years have spread. Their grey experience o'er thy hoary head? Is this the all observing age could gain? Or hast thou known the world so long in vain?