Newton's health, and confusion to mathematics.

Never disregard what your enemies say. They may be severe, they may be prejudiced, they may be determined to see only in one direction, but still in that direction see clearly. They do not speak all the truth, but they generally speak the truth from one point of view; so far as that goes, attend to them.

Some persons are so devotional they have not one bit of true religion in them.

The greatest geniuses have always attributed everything to God, as if conscious of being possessed of a spark of His divinity.

Mistrusts sometimes come over one's mind of the justice of God. But let a real misery come again, and to whom do we fly? To whom do we instinctively and immediately look up?

Never let your love for your profession overshadow your religious feeling. Depend on it that religion will strengthen, not weaken, your energies, and will not only make you a better sailor, but a superior man. Professional studies are not to be neglected; but, on the other hand, take care how you fall into the common error of believing they are the remedy for all the ills of life.

When a man is no longer anxious to do better than well, he is done for.