Spine Straight

I was just at the temple and had an interesting revelation. So everyone there was posing for a picture and I was sitting with my back very straight. For a second a thought about my posture, threw back my shoulders a bit, and raised my chin. All cultures, human and animal communicate a lot though body language. So we communicate to each other through our looks, how we hold ourselves, how we move our hand .... but I have never realized before, I mean at a mind level, how you sit makes yourself feel. I feel very ... strong, able, and something else .... self confidence. Yes, that's it. and I lot more things, but those are some of the main ones, of course physiologically sitting with a straight spine so really helps your body, and the cerebral spinal fluid can flow properly (although don't get me wrong, I have no idea what it actually is!) so just a thought I really wanted to express, and tell all of you!