There is an indisputable qualitative difference between a diamond and glass. 

A diamond is expensive and preponderates. It is held in high regard and is valued highly.

Glass however does not preponderate and has not gained the respect or virtue of a high price. 

Notwithstanding this, no qualitative or main difference is found between a diamond and glass in the dark thick of night. An example of this is the case of the blind man that does not feel or perceive this difference, such that he sees and (treats) both diamond and glass in the same state and honors them equally. 

But he whose eyes are bright and healthy will immediately perceive and understand the expensive weight of the diamond, and will feel and discern the subtle differences between diamond and glass. 

And thus it is said: “The eye is the lamp of the body. If your eyes are healthy, your whole body will be full of light. But if your eyes are unhealthy, your whole body will be full of darkness. If then the light within you is darkness, how great is that darkness!” (Matthew 6:22).

Therefore it is true that if the eye is healthy and bright, by all means it will feel and see the diamond even in pitch black, for “a town built on a hill cannot be hidden” (Matthew 5:14).

Malfono Yusuf Beğtaş