From the beginning of civilization, shaking hands has represented a warm greeting, good sportsmanship, a symbol of trust, and binding of a contract.
God's people are like a musical ensemble, each having unique pitches and timbre. As we yield to our Conductor, we also blend with one another, creating harmony.
Like the symphony orchestra, only as an instrumentalist submits to the leader, working with the other members of the ensemble, can unity be accomplished.
Our advanced communications, which have allowed globalism, are also bringing about tribalism. Rather than uniting everyone, they are dividing.