Vitality and beauty are gifts of Nature for those who live according to its laws.
Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death.
Beyond a doubt truth bears the same relation to falsehood as light to darkness.
The supreme misfortune is when theory outstrips performance
I have discovered that a screw-shaped device such as this, if it is well made from starched linen, will rise in the air if turned quickly.
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.