In discussing the concept of prayer being worship of the heart, R. Berezovsky presents a fascinating interpretation of a passage in BT Berachot 8a. The Talmud states: “R’ Hisda said that a person must always enter through two entrances and then pray.” This passage has a few meanings. Some read this literally, that a synagogue needs two entrances before the sanctuary. If we look at most synagogues, the sanctuary is not immediately at the entrance of the synagogue. There is at least one additional door to enter before the sanctuary. R. Berezovsky reads this passage as referring to two levels a person must achieve before reaching the place of prayer. The first is to rid one’s mind of all extraneous thoughts, only focusing on our worship of G-d. The second door is to then work towards unifying and pairing with the divine. Only once we reach those two levels can we truly be praying, which is the worship of the heart.