His deity is complete, and His humanity is perfect.

[jidong xiao]

约翰的著作不仅包罗万有的论到基督的身位，为对抗异端而争辩，也给信徒豫防注射，对抗一切关于神与基督的异端道理（哲学）。这样的著作不仅第一世纪需要，历代以来也都是不可少的。甚至二十世纪的今天，我们仍然需要这些著作。将来，这些著作还会大大的帮助我们持守关于基督身位的真理，并保守基督的信徒在一切神圣的实际里。我们盼望这些生命读经可以达到同样的目的。

我们若没有看见约翰著作里所包含神圣事物的启示，就不能成为完全、奥秘、包罗万有或善于争辩的。不仅如此，我们也不会正确的接受豫防注射，对抗异端。但我们若看见这启示，就会成为奥秘、包罗万有且善于争辩的，也会接受豫防注射，对抗一切的异端。

约翰福音所启示神格的三一，比圣经其他地方都更完备。我们从约翰福音认识基督在永远里就是神，（约一1，）祂在时间里成了人。（约一14。）祂的神性是完整的，祂的人性也是完全的。因此祂是神也是人，（约二十28，十九5，）有神人二性。

John's writings not only are all-inclusive concerning the Person of Christ and polemical against heresy, but they also inoculate the believers against all heretical doctrines (philosophies) concerning God and Christ. Such writings were needed not only for the first century but have also been needed throughout all the centuries. Even today in the twentieth century, we still need them. In the coming days they will still be a great help in keeping the truth concerning the Person of Christ and in preserving His believers in all the divine realities. We hope that these Life-studies may serve the same purpose. 

If we do not see the revelation of the divine things contained in John's writings, we cannot be complete, mysterious, all-inclusive, or polemical. Furthermore, we shall not be properly inoculated against heresy. But if we see this revelation, we shall be mysterious, all-inclusive, and polemical, and we shall be inoculated against all heresies. 

The Trinity of the Godhead is revealed more fully in the Gospel of John than any other place in the Bible. We know from the Gospel of John that Christ was the very God in eternity (John 1:1) and that He became a man in time (John 1:14). His deity is complete, and His humanity is perfect. Hence, He is both God and man (John 20:28; 19:5), possessing both divinity and humanity.