The call of a prophet and the vision of God which sometimes accompanied it are the two sides of one complex experience. The man who has truly seen God necessarily has a message to men. Not only are his spiritual perceptions quickened and all the powers of his being stirred to the highest activity, but there is laid on his conscience the burden of a sacred duty and a lifelong vocation to the service of God and man. The true prophet therefore is one who can say with Paul, “I was not disobedient to the heavenly vision,” for that cannot be a real vision of God which does not demand obedience. And of the two elements the call is the one that is indispensable to the idea of a prophet. We can conceive a prophet without an ecstatic vision, but not without a consciousness of being chosen by God for a special work or a sense of moral responsibility for the faithful declaration of His truth. Whether, as with Isaiah and Ezekiel, the call springs out of the vision of God, or whether, as with Jeremiah, the call comes first and is supplemented by experiences of a visionary kind, the essential fact in the prophet’s initiation always is the conviction that from a certain period in his life the word of Jehovah came to him, and along with it the feeling of personal obligation to God for the discharge of a mission entrusted to him. While the vision merely serves to impress on the imagination by means of symbols a certain conception of God’s being, and may be dispensed with when symbols are no longer the necessary vehicle of spiritual truth, the call, as conveying a sense of one’s true place in the kingdom of God, can never be wanting to any man who has a prophetic work to do for God amongst his fellow‐men.