Meaning of the light?

In the beginning was the Word, and the Word was with God, and the Word was God. In Him was life, and the life was the light of men. 

Repeat this often, and try to grasp its meaning. Try to understand that each ray of that Divine light will shine forever. 

Try to realise that it really exists in each individual. Try to help all, and each one you come in contact with, to clear away the cobwebs of ignorance and error, which dim the light of this Divine ray.