A laser is a weak source of energy. A laser takes [only] a few watts of energy and focuses them in a coherent stream of light. But with a laser, you can drill a hole in a diamond or wipe out cancer.
It is the essence of truth that it is never excessive. Why should it exaggerate? There is that which should be destroyed and that which should be simply illuminated and studied. How great is the force of benevolent and searching examination! We must not resort to the flame where only light is required.
It may be that you are not yourself luminous, but that you are a conductor of light. Some people without possessing genius have a remarkable power of stimulating it.
Always remember the proverb: "This too shall pass." Your negative feelings won't last forever, there's a light at the end of every tunnel. It might not happen today or tomorrow, but you'll feel better eventually.
Your mind has some clearness and capacity for right thinking; it opens towards the heights, but for its own sake, - to receive light from above for its own activity.
It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing - a somewhat unfamiliar conception for the average mind. Furthermore, the equation E = mc², in which energy is put equal to mass, multiplied by the square of the velocity of light, showed that very small amounts of mass may be converted into a very large amount of energy and vice versa.