Those who make the worst use of their time are the first to complain of its shortness. - Jean de La Bruyère

Profound ignorance makes a man dogmatical; he who knows nothing thinks he can teach others what he just now has learned himself; whilst he who knows a great deal can scarcely imagine any one should be unacquainted with what he says, and, therefore, speaks with more indifference.

Le commencement et le déclin de l'amour se font sentir par l'embarras où l'on est de se trouver seuls.

That we seldom repent of talking too little and very often of talking too much is a … maxim that everybody knows and nobody practices