I have wasted my hours.

The painter will produce pictures of little merit if he takes the works of others as his standard.

Man has much power of discourse which for the most part is vain and false; animals have but little, but it is useful and true, and a small truth is better than a great lie.

Avoid the precepts of those thinkers whose reasoning is not confirmed by experience.

All objects transmit their image to the eye in pyramids and the nearer to the eye these pyramids are intersected the smaller will the image appear of the objects which cause them.

If you are alone you belong entirely to yourself. If you are accompanied by even one companion you belong only half to yourself or even less in proportion to the thoughtlessness of his conduct and if you have more than one companion you will fall more deeply into the same plight.

You must grow in patience when you meet with great wrongs, and they will then be powerless to vex your mind.