The purpose of Zazen Meditation is to free your mind of the materialistic hold our lives have on us and once you are able to allow your thoughts to enter and quietly leave without investigation you will no longer be limited. This will provide you the quiet calm needed to see the truth of your nature and your place within yourself and the world. Your body, mind, and breath will become one.
If you are walking on soft earth, the best way is to walk barefoot, no shoes. You have a tremendous contact with the earth. We belong to the earth! Half of us is part of the earth and half is part of the sky. And when you are walking in the early morning sun on the wet earth, you are enjoying both the sky and the earth. It was perfectly right!