Law was once introduced without reason, and has become reasonable.

Reason commands us far more imperiously than a master; for in disobeying the one we are unfortunate, and in disobeying the other we are fools.

All great amusements are dangerous to the Christian life; but among all those which the world has invented there is none more to be feared than the theater. It is a representation of the passions so natural and so delicate that it excites them and gives birth to them in our hearts, and, above all, to that of love.

You see, if the height of the mercury [barometer] column is less on the top of a mountain than at the foot of it (as I have many reasons for believing, although everyone who has so far written about it is of the contrary opinion), it follows that the weight of the air must be the sole cause of the phenomenon, and not that abhorrence of a vacuum, since it is obvious that at the foot of the mountain there is more air to have weight than at the summit, and we cannot possibly say that the air at the foot of the mountain has a greater aversion to empty space than at the top.

If you do not love too much, you do not love enough.

Caesar was too old, it seems to me, to go off and amuse himself conquering the world. Such a pastime was all right for Augustus and Alexander; they were young men, not easily held in check, but Caesar ought to have been more mature.

To doubt is a misfortune, but to seek when in doubt is an indispensable duty. So he who doubts and seeks not is at once unfortunate and unfair.