Calvin turned to the teachings of Jesus for a theological interpretation of the diversity that some people accept the "covenant of life" and some do not. Pointing to the Parable of the Sower, Calvin observed, "it is no new thing for the seed to fall among thorns or in stony places".[18] In Jesus’ teaching in John 6:65 that "no one can come to me unless it has been granted him by my Father", Calvin found the key to his theological interpretation of the diversity.[19]