A Choralist is not the conductor of a chorus. He is not the composer of symphonies. Nor is he is an orchestrator of instrumentalists.
Rather, a Choralist is an ordinary member of the ensemble. He is a person who is tasked with carrying a simple tune. A person who obeys the commands of the supercilious melodist basking in the rapturous applause of the audience.
And yet, a Choralist has the power to shake the foundation of the unchained melody. He has the ability to sway the crowd to the rhythm of the tune in his own unique way. And that is what makes him, the Choralist, the most powerful person in the choir.