There is no need for temples, no need for complicated philosophy. Our own brain, our own heart is our temple: The philosophy is kindness.
The tree of life is one's inner axis that grows from the depths of the earth and reaches to the heavens. It connects together the primal opposites of the temporal and the eternal. It is life lived from the "still center of the turning world" and it embraces the deepest human mystery: that we are eternal beings living in a world of time.