The Vedas give information on various subjects. They have come together and form one book. And in later times, when other subjects were separated from religion - when astronomy and astrology were taken out of religion - these subjects, being connected with the Vedas and being ancient, were considered very holy.
Despite my solitary life, I have found infinite joy in books and writing, and am by far too much interested in the affairs of the world to quit the scene before Nature shall claim me.
The book which the reader now holds in his hands, from one end to the other, as a whole and in its details, whatever gaps, exceptions, or weaknesses it may contain, treats of the advance from evil to good, from injustice to justice, from falsity to truth, from darkness to daylight, from blind appetite to conscience, from decay to life, from bestiality to duty, from Hell to Heaven, from limbo to God. Matter itself is the starting-point, and the point of arrival is the soul. Hydra at the beginning, an angel at the end.
The Brahmins say that in their books there are many predictions of times in which it will rain. But press those books as strongly as you can, you can not get out of them a drop of water. So you can not get out of all the books that contain the best precepts the smallest good deed.
Most people would rather not hear about the environment because it's scary, so my goal was to write something that was readable so that people would learn a lot and not be so depressed that they would throw the book away.