Since there is only one whole life, how does it come that we see so many different forms of life? The question actually answers itself, as it says that we see only different "forms" of life. But then, people may say that they just don't feel "whole" with everything else they see.

To answer this, we need to think about consciousness. Life is made up by beings, some of them conscious like humans, some of them unconscious, like plants and most animals. Seeing the wholeness is a matter of being conscious about it. We, as humans, are at least conscious about the fact that we exist. But this doesn't mean that we are conscious about everything. To demonstrate this simply try to figure out what makes up your consciousness... so it seems that we are not fully conscious, which ultimately leads to the conclusion that we have not yet reached our goal of evolution.

Life itself must, in the end, be whole, otherwise we would not be able to interact with our environment. We can conclude this when we think about interaction with our environment. We wouldn't be able to ever sense our environment if we were not connected to it in some way. Nothing, that is not connected to each other at all, can in any way take note or be aware about each other, think about it. This means, that we are somehow connected to each other, thus being part of the same one thing - life.