BIGGER THE TYAAG, HIGHER THE JOURNEY
Tree is the being closest to god. Why? If you look at the life of a tree, it is always giving—shade, pure air, food, shelter...sacrificing itself, bearing the sun, winds and water. It does so till the last, even as it decays and dies, it continues to give. That is the path to divine, to sacrifice yourself, to help others. The greater the sacrifice, the more is your glow, and the sooner you are seen by divine. You can either be in light, or you are in darkness.
The pain and suffering of humans and animals is because of their karmas. If you have the capacity to relieve their pain, and you do it, then you are in light. Else you are in darkness.