Rational thinking indicates that the world was in dire need of revelation, of water from the fountain of spiritual guidance, at the time when the Holy Prophet appeared. He led an ideal life, a perfect example to be followed throughout the future. He started his mission against immense difficulties. He and his followers met strong persecution and opposition. But he was protected and helped by God in miraculous ways. Before his death his mission was firmly established all over Arabia and was rapidly spreading to other countries.
He worked miracles. He foretold the future, and his prophecies were fulfilled not only in his lifetime but continue to be fulfilled in our time as well. He brought a teaching; which has attracted countless adherents since he appeared. In short, all rational tests prove that the mission of the Holy Prophet Muhammad was truly from God.