I am a medium and actually have talked to many dead people. I communicate with my ancestors daily. So I know we continue to exist, though I know our human friends take on new spiritual forms that I "see" as really vibrant white-pink-blue light, and they merge into a field of love. Many of them watch over us. I have seen ghosts (usually right at sunset and especially in natural areas, though also in ordinary spots like the pool or BBQ restaurant). I help lost souls transition when they did not cross over at death. There are nasty spirits that mess with humans, and I can compassionately get rid of these also. A great book on reincarnation is "Destiny of Souls," which includes many regressions in between lives. I was touched reading it and it resonated as truthful.