Ego is the source of all things negative. Ego is the concept of self. Greed.
If 'ego' is the concept of self, that is, to an extent, a 'source' of negativity, but it's debated as to whether or not the self creates negativity, merely experiences it from an external object, or can even be perceived as 'willed' negativity-- or perhaps deterministic 'negativity' that, if it is inevitable, cannot be of much of a 'negativity' in-itself, for why moralize destined phenomenons at all?
What I'm really saying here is this: You cannot appear very philosophical when your 'truths' are merely vague cliches-- so presumptuous and broad that your thoughts all amount to superficiality.
What do you not understand? When you dream, everything is one, together, it's your consciousness. Life is divided, we function as humans with our ego. Ego is what makes us human, it's doubt, it's reason, it's fear. It's everything but love.
You can't hate and love at the same time.