Medrish Talpiyot At Alef
-Know that everything in the spiritual worlds manifest on the physical.
-By gazing at the stars while in a meditative state one can learn many things. 
-This wisdom was known to the ancients.
-Avrahom was a master in this wisdom.
-When gazing at his own horoscope it showed he could not have children.
-G-d revealed to him how to transcend above the constrictions of destiny.