In our former lives, we were trees. Maybe we have even been oak trees ourselves. This isn’t just Buddhist theory; it’s science. The human species is a very young species—we appeared on the Earth only recently. Before that, we were rock, we were gas, we were minerals, we were single-celled beings. We were plants, we were trees, and now we have become humans. We have to recall our past existences. This is not difficult. You just sit down and breathe and look, and you can see your past existences.
