Your post is inspiring! This is relevant to me as well:

I feel ths way when I am helping other people than myself. I feel this way when I give. I feel this way when I find solutions to unsolved problems. I feel this way when I make people smile. I feel this way when I do stuff which makes sense in my eyes. I feel this way when I think that I make the world a better place.

I believe, though, that before making the world a better place, we have to make ourselves better people. Any change in the world starts from inside. We cannot make the whole world a better place, but every little step and action make a difference, even if it's a change of a mindset.