I have always felt it is my destiny to build a machine that would allow man to fly.

Shadow is the diminution alike of light and of darkness, and stands between darkness and light.

To make a perfume, take some rose water and wash your hands in it, then take a lavender flower and rub it with your palms, and you will achieve the desired effect

The noblest pleasure is the joy of understanding.

Iron rusts from disuse; water loses its purity from stagnation... even so does inaction sap the vigor of the mind.

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.

Ask counsel of him who rules himself well.