These are arts that I have written in the past and present, I collected them for myself and did not intend to publish them. When some of the brothers heard something of that, they advised me to publish it. Then I increased its formulation and arrangement, and I saw, with my short-sighted vision, that I should collect that in a book, seeking its benefit in the present, at home, and while traveling. So I made it a source of inspiration for the reader and a companion for the traveler, and a middle ground between the two.