The message...

It is the message that proves the messenger, not the claim.

Bowl of Saki, by Hazrat Inayat Khan
Commentary by Pir-o-Murshid Inayat Khan:

The prophet brings love, the love of God, the Father and Mother of the whole humanity, a love that is life itself. No words nor actions can express that love. The presence of the prophet, his very being, speaks of it, if only the heart had ears to listen. Verily, to the believer all is right, and to the unbeliever all is wrong.

The principal work of the prophet is to glorify the Name of God and to raise humanity from the denseness of the earth, to open the doors of the human heart to the divine beauty which is everywhere manifested and to illuminate souls which are groping in darkness for years. The prophet brings the message of the day, a reform for that particular period in which he is born. A claim of a prophet is nothing to the real prophet. The being of the prophet, the work of the prophet, and the fulfillment of his task is itself the proof of prophethood.

There was a time when the world was not capable of seeing. Humanity did not have enough realization to recognize the message, that is why the claim of prophecy had to be made. But now the world can recognize, sooner or later, what is right and what is wrong. The warner, the master, the messenger of today will not claim. He will only work. He will leave his work to prove for itself whether it is true or false.

There was a time when the message was given while the people were waiting for a messenger to come, as happened in the time of Jesus Christ, when there were thousands and thousands waiting for a messenger from above. The Master came, and gave his service to the world, and left again. Some realized what had happened then, and some are still waiting. But the one who claimed to be Alpha and Omega is never absent; sometimes he shows himself, sometimes he keeps in the background. ... The divine message is the answer to the cry of souls individually and collectively; the divine message is life and it is light. The sun does not teach anything, but in its light we learn to know all things. The sun does not cultivate the soil nor does it sow seed, but it helps the plants to grow, to flower, and to bear fruit