John 1:4

4. In him was life Life original and essential. For had he not possessed original life, neither life, nor motion, nor sense could have ever existed in the universe. And from his original life all other life is derived. And this life is more than mere existence. A thing may exist and yet have no life. Life is the opposite of death; existence is the opposite of annihilation or non-existence. Existence is at the bottom and is the basis, and life overlies it.

And the life was the light of men This life imparted by the Logos to man became the light; that is, the consciousness. It appears as the physical or sensitive consciousness by which men feel; the intellectual consciousness by which they perceive and reason. But this light, thus far, is possessed, more or less distinctly, by mere animals. But it is rather the light possessed by men alone, over and above mere animal nature, that our Evangelist speaks of. There is the moral and spiritual consciousness by which men have eternal and divine conceptions: such as conceptions of God, of absolute right, of holiness, and of immortality. And this highest consciousness of the human spirit is the basis of the operation of the divine Spirit in and upon man, by which he is able to be in himself a responsible and a holy being. Thus have we the climax of existence, of life, and of consciousness, intellectual and spiritual.