So it is in evidence of plan in proof of a revelation. If there had been no alleged revelation up to the present time, and if Christ were now to appear suddenly in His first advent in all the power and glory which Christians expect for His second, the proof of His revelation would be demonstrative. So that, as a mere matter of evidence, a sudden revelation might be much more convincing than a gradual one. But it would be quite out of analogy with causation in nature[74]. Besides, even a gradual revelation might be given easily, which would be of demonstrative value--as by making prophecies of historical events, scientific discoveries, &c., so clear as to be unmistakeable. But, as before shown, a demonstrative revelation has not been made, and there may well be good reasons why it should not. Now, if there are such reasons (e.g. our state of probation), we can well see that the gradual unfolding of a plan of revelation, from earliest dawn of history to the end of the world ('I speak as a fool') is much preferable to a sudden manifestation sufficiently late in the world's history to be historically attested for all subsequent time. For 1st. Gradual evolution is in analogy with God's other work. 2nd. It does not leave Him without witness at any time during the historical period. 3rd. It gives ample scope for persevering research at all times--i.e. a moral test, and not merely an intellectual assent to some one _(ex hypothesi)_ unequivocally attested event in history. The _appearance_ of plan in revelation is, in fact, certainly remarkable enough to arrest serious attention. If revelation has been of a progressive character, then it follows that it must have been so, not only historically, but likewise intellectually, morally, and spiritually. For thus only could it be always adapted to the advancing conditions of the human race. This reflection destroys all those numerous objections against Scripture on account of the absurdity or immorality of its statements or precepts, unless it can be shown that the modifications suggested by criticism as requisite to bring the statements or precepts into harmony with modern advancement would have been as well adapted to the requirements of the world at the date in question, as were the actual statements or precepts before us.