Any man can make mistakes, but only an idiot persists in his error.
Let us not go over the old ground but rather prepare for what is to come.
We should not be so taken up in the search for truth, as to neglect the needful duties of active life; for it is only action that gives a true value and commendation to virtue.
Let every man practise the trade which he best understands.
I prefer tongue-tied knowledge to ignorant loquacity.
Let a man practice the profession which he best knows.