In about AD 530 the Christian Byzantine Emperor Justinian even banned the recitation of the Shema since he considered it to be a denial of the Trinity. But modern Trinitarianism takes a different approach, claiming that “one” can mean three because “one” can mean a compound unity. Three things together can make up one of something else.  A couple of biblical examples are put forward. For instance, in Genesis 1:5 evening and morning are one day. A husband and wife become one flesh (Gen. 2:24). The spies came back with one (echad) cluster of grapes" (Num. 13:23). Let’s take a closer look at the “compound unity”, “three-in-one” claim.