who's my ISHT DEVA/DEVI in Vedic Astrology (Jyotisha) Posted July 15, 2009 · Report reply your isht who will able to tell you......They can only tell you your prefer god as per your horoscope. Isht will not mention in horoscope but it mention in your heart,your soul.When you in trouble which one you ask to help you,you pray which god when you need anything.....which god name come to your heart when you close your eyes. Isht dev only give you what you want. BUT REMEMBER IF YOU DON'T PRAY,RESPECT YOUR MOTHER,FATHER.....NO ONE HELPS YOU EVEN ANY GURU JI/ISHT DEV. MOTHER IS VERY FIRST AND ULTIMATE GURU OF ANY ONE.