It is not the five senses which know the world outside, since they are only instruments which the mind uses. It is not even the intellect, since that merely reproduces the image formed out of the total sense reports. They are not capable of functioning by themselves. It is the principle of Consciousness which is behind both, and for which they are simply agents, that really makes awareness of the world at all possible. It is like the sun, which lights up the existence of all things.