Did you know when you were a kid that you would come to this forum and type out what you have? Irony, the only constant thing in the universe is change. Accept it or not is a choice only you have.
let's say that you see a pastry in a cake shop. If eat, it affects you, the thing you are eating, the possibilities of it being eaten by someone else or just decaying. In all cases, it is being affected. Hope it was not too confusing ;P
All. It is only that certain countries are very well versed with marketing and hence it seems that those countries have the best philosophers. If Einstein was born in Nairobi, we would have never known about him.
Knowledge is useless unless you act on it. Also, good and evil is just one's conditioning. Something that is good is evil to another. So in a nutshell, perceptions are reality.
It is a journey to reach to our source. We are just visiting this plane on our journey. It is like a level in a video game. We need to transcend to move to the next level.