Delivering the call for acceptance of the Truth means initiating the most difficult campaign. One who does so becomes persona non grata in his entire surroundings. In such conditions, the only Being whom the preacher of Truth finds as his sympathiser and supporter is his Lord. He not only goes on remembering his God in his heart, but he also stands before Him during the night. Night time is the time of leisure. In the dead silence of night man finds a better opportunity to turn towards God with full concentration. In the path of the mission of Truth, strewn as it is with difficulties, this is the only real weapon which the missionary has. It is the way of a true preacher that, when he is troubled by an addressee, he does not inveigh against or argue with him, but rushes towards God. He abstains from negative reaction till the last moment. And to continue to work, rising above such a reaction, is the essential condition which makes a man a missionary of the Truth in the real sense.