The Latin term renes is related to the English word ”reins”, a synonym for the kidneys in Shakespearean English, which was also the time the King James bible was translated. Kidneys were once popularly regarded as the seat of the conscience and reflection, and a number of verses in the Bible state that God searches out and inspects the kidneys, or ”reins”, of humans. Similarly, the Talmud states that one of the two kidneys counsels what is good, and the other evil. (source: Wikipedia).