Meditation is imperative in understanding this most important fact that the 'self is never annihilated, even when the physical body perishes.
Man is essentially two things: A small personal SELF & a huge impersonal SELF. And, man has to take care of both the 'SELVES'.
Meditation is being with our own self, loving our own self, spending time with our own self. Understanding the Law of Karma means immediately becoming a vegetarian, becoming a meditator and understanding once for all that, we alone are responsible for creating all our particular realities.
Our foremost duty should be the study our own self, and discovering answers to the following questions: 1. Who are we? 2. Where do we come from? 3. What exactly is Birth? 4. What exactly is Death? 5. What exactly is Life? 6. What exactly is the source of human misery? 7. Is misery self-inflicted, or decreed by God, over which we don't have any authority.
We have to realize our own Cosmic Self! Once we know about Cosmic Self, we understand that we are everybody and everybody is ourself! There is no separation whatsoever! There is no other! We exist everywhere as everything and as everybody!