How do you know the character of a man by looking at his eyes?
Not only by looking at his eyes. I know the character of a man through self-identification. And then outwardly, if you want, the eyes are like doors or windows: there are some which are open, so one enters within, goes very deep inside, and one may see everything that happens there. There are others which are partly open, partly closed; others still have a veil, a kind of curtain; and then there are others which are fastened, locked up, doors closed so well that they cannot be opened. Indeed, this is already an indication, it gives an indication of the strength of the inner life, the sincerity and transparency of the being. And so, through these doors that are open I enter and identify myself with the person within. And I see what he sees, understand what he understands, think what he thinks, and I could do what he does (but usually I refrain from that!) and in this way I get to know what people are like. And it doesn’t need much time; it goes very fast. It can even be done through a photograph, but not so well. A photograph captures only a moment, a minute of somebody; if there were many photographs… But still, even with a photograph, by going a little deeper one can have a fairly clear idea. But all knowledge is knowledge by identification. That is, one must become that which one wants to know. One may surmise, imagine, deduce, one may reason, but one does not know.
Ref : Questions and Answers 1953