Astrology can influence - however Spirit is Supreme
The whole of life is a series of vibrations, radiations and emanations, and you are influenced by every part of the natural order or being. All these cause some influence on you, but none of them is so potent that it exercises a power which you cannot alter.

It is not true that your life is predestined just because at the moment of physical birth some star was in the ascendant. All planets, all nature, everything in the universe, all beings have some effect on you. But you are the master of your soul; you have personal responsibility, and you fix your own destiny according to your spiritual progress. 

All planets have radiations which affect the physical body, and things which affect the physical body have some effect on the spirit; but the spirit is supreme; the spirit is pre-eminent, and there is no star or planet or constellation or galaxy which can prevent you from mastering all the physical influences which affect your body.

You are part of the Source, and because you are divine, because the power of creative life is within you, because you are a portion of that power which fashioned all life, you can rise triumphant over all that might hold your body in subjection. The people you meet are influences on you; the books you read are influences on you; but they are influences only, not overwhelming and overriding.