21主的降生是神的出来。祂不在神那一边作权柄，却来到人这一边受人的限制，且作了奴仆。主这样作是冒了一个大险，因为主一从神格里出来，便有回不去的可能。祂在子的地位上若不顺服，虽可用权柄把神格取回来，但顺服的原则就永远断绝了。主出来有两条路可走回去：一条是出来作人，事事处处绝对无保留的完全顺服，凡事建立神的权柄，无丝毫背叛，一步一步顺服神带祂回去，让神立祂为主；第二条路，如果祂以作人、作奴仆有难处，因肉身的软弱与限制，实在不能顺服，祂也可以用祂神格的权柄、荣耀、能力冲回去。但主将第二条不该走的路丢掉了，祂却存心顺服，走这一条顺服以至于死的路。祂既倒空自己，就不再充满自己；这种出尔反尔，是祂所不作的。……必须祂在人的地位上顺服至死才能回去（倪柝声文集第三辑第一册，一五七至一五八页）。
21The birth of the Lord is the coming forth of God. He did not retain His authority by being God. Rather, He took up human restrictions by becoming a man, even the restriction of a slave. This was a very risky matter for the Lord. Once the Lord stepped out from the form of God, there was a possibility that He could not return as a man. If He had not been submissive, He could have reclaimed the divine form of His deity only in His position as the Son. However, the principle of submission would have been broken forever. When the Lord stepped out, there were only two ways for Him to return. One was to be a proper man, absolutely and unreservedly submitting with no trace of rebellion, being obedient step by step, and letting God bring Him back and set Him up as Lord. If being a slave had been too difficult for Him, if weakness and the limitations of the flesh had been too much for Him, and if submission had been beyond Him, the only other way to return would have been for Him to force His way back by using the authority and glory of His deity. But our Lord rejected this way, a way which He was not meant to take. He set His heart to subject Himself to the way of submission even unto death. Since He emptied Himself, He could no longer refill Himself. He did not vacillate in His mind…Before He returned, He completed His course of being obedient unto death in the position of a man. (CWWN, vol. 47, “Authority and Submission,” pp. 143-144)