So remember this: light can exist without life. Matter is just an appearance, a “condensity,” an intensity of light, and life is a manifestation. That which is hidden in light is manifested. Life is not an appearance: life is a manifestation. Matter is just light condensed. So when light remains light and becomes condensed, it is matter. When light evolves, manifests its potentiality, it becomes life. If it simply remains life, then death is the end. If it evolves more, then it becomes love – and love is deathless. You may call it God, you may call it anything. These are basic points. If you remember them, then we can proceed into the sutra.
Third: in this whole world everything is relative except light. Only light has a constant velocity. That’s why physics takes light as the measurement of time. Everything is relative; only light is, in a certain way, absolute. Light travels with a constant velocity; nothing else is constant. So only light is absolute. There is no change: the velocity is absolute, the speed is absolute. So light becomes a mystery. It is not relative to anything, and everything else is relative to light. So nothing can travel with more speed than light, because if anything takes the speed just equivalent to light it will turn into light.
If we can throw a stone with the speed of light, the stone will become light. Anything moving with the speed of light will become light. So nothing reaches the velocity of light, and nothing transcends the velocity of light. The speed of light is 186,000 miles per second. Anything traveling with that speed will become light. That’s why scientists say we cannot travel with the speed of light, because anything – we, or aircraft, rockets – anything traveling with that speed will become light itself.
Fourth: light travels without any vehicle; everything else can travel only with a vehicle. Only light travels without vehicles. That is mysterious. And also, light travels without any medium. Everything else has to travel through a medium. A fish can travel in water, a man can travel in air, but light travels in nothing, in nothingness.
In the beginning of this century, physicists just imagined something like ether. They imagined something must be there, otherwise how can light travel? So that was a basic question: light comes to the earth from the sun or from some star, it travels, so there must be some medium through which it travels. So just because nothing can travel without a medium, in the beginning of this century scientists hypothetically assumed that there must be some x – they named it ether – through which light travels.
But now they have found that there is no medium. The whole universe is just a vast space, and light travels in nothingness. That means even nothingness cannot destroy it, even emptiness cannot affect it. That means even nonbeing cannot affect light’s being. And it can travel without any medium, without any vehicle. That means the energy is not derived from somewhere else. Light itself is the energy. If you have some derived energy, then you will have to travel through mediums, through vehicles; you cannot go yourself. Light goes by itself.