It's the eyes...

Example A:

What can the eyes tell us about the people we talk to? My eyes (see picture above) change colour with the light.

Example B:

Same eye, different light. In that way, I'm like Edward Cullen, because it also reflects my mood. The greener my eyes, the more volatile I am. The more extatic or depressed. The browner my eyes are, the more mellow I am.

Now what does it tell you about a person, when you look into their eyes. If you know this person very well, it might tell you more than any body language ever could.

Example C:

Now you tell me in which picture I was happy. And in which I was sad... it's possible just by looking at my eye colour.

Have a very nice night, take care.