A Journey to the core
Who Am I
Concentration meditation consist of focusing your attention on one thing to the exclusion of everything else. The most recommended object of concentration is the breath, because it is something you do naturally. You don’t need to think about it in order to do it and you can’t stop it. With any other object of concentration, you run the risk of thinking about it instead of simply witnessing it and of forgetting to do it.
Focusing on the your object of concentration will have the effect of shutting down every other “object” one by one. It might start with simple things like your memory, your thoughts. Then the annihilation will spread to your sense of space or time. Ultimately, everything will cease to exist except you. You and everything your know will be absorbed into the breath and become it. In that moment you will get a glimpse of who or what you really are. If you exist in that moment (and you will exist more than ever), then everything else is superfluous. All you are is this pure existence.
As you come out of your meditation, everything will come back: the sense of self, space, time, thoughts, memories. You are you again, or so it seems. Now you knows from first hand experience what/that you really are.