No need for training or esoteric religious culture to enjoy this book. Written by someone who has "a priori" no connection with the afterlife, he demonstrates his existence with evidence which gives hope to those who suffer from an insurmountable grief. In our materialistic world, the testimony of a lived probably has more value than the categorical denials of those who have not approached the subject seriously. I recommend it without restraint. Thank you to the author for having dared ...