Rebbe Nachman teaches us that there are 5 key differences between the Knowledge of G-d and the knowledge of a human being. Rabeinu teaches us that these 5 things which separate G-d’s knowledge from ours is actually the Hei/הא (the letter ה has a numerical value of 5) which allows people to have children. Rabeinu teaches us that a person can only attain this Hei when he perfects his knowledge and is then able to nourish himself from these 5 aspects of the Knowledge of G-d. This is only possible through making converts, ie. bringing people closer to G-d. This is exactly the work Avraham and Sarah engaged in…