Quiz: Who's the author of "The proof of the pudding is in the eating"—(a) Thomas Edison, (b) Alexander Graham Bell, (c) Orville or Wilbur Wright? Answer: Miguel de Cervantes in his romance Don Quixote. But it might have been (a), (b), or (c). Through their perception, ingenuity, and perseverance they corroborated the truism with the electric light, telephone, and airplane.
Take music, for instance. Isn't the proof that there is music found in the rendering of it? And musicians are judged according to their ability to compose, perform, or teach it. Actually, don't those in most all walks of life prove their worth by their works?
So it is with the things of Spirit. The Bible says:"Shew me thy faith without thy works, and I will shew thee my faith by my works." James 2:18. Of course, not blind but enlightened faith is requisite. The greater the spiritual understanding, the greater the works, as evidenced by Christ Jesus in healing sickness and disease and overcoming sin and death.