an excellent example of the spiral is a pinecone.
it grows on a tree whose branches spiral up, at regular intervals vertically and horizontally, maximizing exposure to sun.
the pinecone at first heads up, with tiny flowers for pollination, all arranged in spiral form.
as it matures, the pinecone heads down, the brackets eventually opening to spread seed, again the spiral formation ensures the widest broadcast.
spirals when drawn by hand can be initiated in the centre, spiralling out, or at the outside, spiralling in.
as the trees in a forest revolve around access to water, sun and soil, branches revolve and grow around a tree, pinecone bracts and seeds revolve and grow, spreading the growth of the forest in a ever-increasing spiral.
the spiral is revolving, a revolution of life