Time and Movement?

What is time? That is a pretty tough question. It sounds so simple and the answer can't stand every argument that people have about it. We live every day of our lives with notion of time, we classify our movements with time, we plan our activities with time and we say we are living in the "present". Somebody once said past is history, future is a mystery but present is a gift, that is why it is called present. Well I think this sentence is talking metaphorically as if we couldn't go back or forward in time, assuming that the only thing we can control completely is what we do every new second that passes. I don't agree with is completely. Though I understand that what I am in the present is the product of what I was, what I have experienced and what I have or haven't learned from it, I still doubt whether I change because time passes or time passes because I change? For this question I took a look to Albert Einstein's Relativity Theory. He states that each object has its own time, we use a time that is connected to other's and so on and so forth, yet when the speed of a movement gets closer to the speed of light, time seems to be wrong or doesn't match with ours as it can move between our time at a speed we can't even imagine. That makes me think if I am really seeing what is in reality or whatever IS. My whole view of reality is being modified completely as I don't believe in impossibilities anymore, I just wanted to figure out the How? I believe now that the light that passes in front of our eyes is the same that was since the beginning of the human race and before and is the same that is existing in this moment(IRONIC) whether we stopped existing in a future or we transformed or we went to live to another planet! I am trying to figure out why, but everything looks like is losing the perspective, like we live with such paradigms that punish these thoughts and the world is just not the world and everything is not what it was explained to be omg. Now there are many things we need to consider before making conclusions and the fact is that we would need some extra-special glasses to see bodies with a high speed that are passing through us, or something similar. I don't think that what seems to be death or inanimate is what people describe, but bodies moving at a very slow speed or at a very high speed, now it looks like movement in relation with time creates realities and we are sensing what moves at a speed similar to ours.