" But how is one to tell whether it be in truth the spirit of God that is speaking in a man?' You are not called upon to tell. The question for you is whether you have the spirit of Christ yourself. The question is for you to put to yourself, the question is for you to answer to yourself: Am I alive with the life of Christ? Is his spirit dwelling in me? Everyone who desires to follow the Master has the spirit of the Master, and will receive more, that he may follow closer, nearer, in his very footsteps. He is not called upon to prove to this or that or any man that he has the light of Jesus; he has to let his light shine. It does not follow that his work is to teach others, or that he is able to speak large truths in true forms. When the strength or the joy or the pity of the truth urges him, let him speak it out and not be afraid—content to be condemned for it; comforted that if he mistake, the Lord himself will condemn him, and save him 'as by fire.' The condemnation of his fellow men will not hurt him, nor a whit the more that it be spoken in the name of Christ. If he speak true, the Lord will say 'I sent him.' For all truth is of him; no man can see a true thing to be true but by the Lord, the spirit. "
― George MacDonald , Unspoken Sermons: Series I, II, III