The grave will fall in upon him who digs it.

The vine that has grown old on an old tree falls with the ruin of that tree, and through that bad companionship must perish with it.

While you are alone you are entirely your own master and if you have one companion you are but half your own, and the less so in proportion to the indiscretion of his behavior.

Your brain is much better than you think; just use it!

Men born in hot countries love the night because it refreshes them and have a horror of light because it burns them.

It is ordained that to the ambitious, who derive no satisfaction from the gifts of life and the beauty of the world, life shall be a cause of suffering, and they shall possess neither the profit nor the beauty of the world.

Every obstacle yields to stern resolve.