The first and foremost source of trinitarian belief was the growing recognition of the divinity of Christ and the need to make sense of the relation between the one whom Jesus addressed as Father and the one now called the Son of God in a more than human sense. It is highly unlikely that the man Jesus thought in trinitarian terms. He addressed God as Father in a particularly intimate way and he was clearly conscious of a unique commission and a unique authority. But God was Father to him as to any