Life after death is not a mystery

“The difference between death and birth is only a thought-moment: the last thought-moment in this life conditions the first thought-moment in the so-called next life, which, in fact, is the continuity of the same series. During this life itself, too, one thought-moment conditions the next thought-moment. So, from the Buddhist point of view, the question of life after death is not a great mystery, and a Buddhist is never worried about this problem.”

Ven. Dr. W. Rahula, "What the Buddha Taught"