I recommend you take care of the minutes: for hours take care of themselves - Philip Dormer Stanhope

Conceal your learning from the company.

Never display your learning, but on particular occasions. Reserve it for learned men, and let even these rather extort it from you, than appear forward to display it. Hence you will be deemed modest, and reputed to possess more knowledge than you really have. Never seem wiser or more learned than your company. The man who affects to display his learning, will be frequently questioned; and if found superficial, will be ridiculed and despised; if otherwise, he will be deemed a pedant. Nothing can lessen real merit (which will always shew itself) in the opinion of the world, but an ostentatious display by its possessor.

If ever a man and his wife, or a man and his mistress, who pass nights as well as days together, absolutely lay aside all good breeding, their intimacy will soon degenerate into a coarse familiarity, infallibly productive of contempt or disgust.

Words are the dress of thoughts; which should no more be presented in rags, tatters, and dirt than your person should.