Hilchos ribbis is one of the least studied areas of halachah. Rav Pinchas Vind, founder of the Beis Horaah L’Inyanei Ribbis, is here to help you through it
A tzaddik is surrounded by the air of Gan Eden, so when you stand within daled amos (about six feet) of his tziyun, your tefillos go into the air of Gan Eden