If you can get an explanation of a phenomenon from within its nature, it is nonsense to look for an explanation from outside. If the world explains itself, it is nonsense to go outside for an explanation. Have you found any phenomena in the life of a man that you have ever seen which cannot be explained by the power of the man himself? So what is the use of goi...ng to the stars or anything else in the world? My own Karma is sufficient explanation of my present state. So in the case of Jesus himself. We know that his father was only a carpenter. We need not go to anybody else to find an explanation of his power. He was the outcome of his own past, all of which was a preparation for that Jesus. Buddha goes back and back to animal bodies and tells us how he ultimately became Buddha. So what is the use of going to stars for explanation? They may have a little influence; but it is our duty to ignore them rather than hearken to them and make ourselves nervous. This I lay down as the first essential in all I teach: anything that brings spiritual, mental, or physical weakness, touch it not with the toes of your feet. Religion is the manifestation of the natural strength that is in man. A spring of infinite power is coiled up and is inside this little body, and that spring is spreading itself. And as it goes on spreading, body after body is found insufficient; it throws them off and takes higher bodies. This is the history of man, of religion, civilisation, or progress. That giant Prometheus, who is bound, is getting himself unbound. It is always a manifestation of strength, and all these ideas such as astrology, although there may be a grain of truth in them, should be avoided.
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 8/Notes Of Class Talks And Lectures/Man The Maker Of His Destiny