After this there was a feast of the Jews; and Jesus went up to Jerusalem.
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Theophylact of Ochrid
AD 1107
It was a feast of the Jews, Pentecost, I believe. The Lord went up on this feast for two reasons: first, so as not to appear by His absence to be opposed to the law, but to be seen celebrating together with the others. Secondly, He went up to the feast to draw more people to Himself by His signs and teaching, especially from among the guileless multitude. For the farmers and craftsmen, who on other days would be busy at their work, always gathered together on the feast days. The pool was called Sheep's Pool, because the sheep intended for sacrifice were gathered there, and after they were slain their entrails were washed in its water. It was the common belief that simply from the washing of the sacrificial entrails the water took on a divine power, and because of this, the angel would come to it at certain times to work a miracle. Here we see divine providence guiding the Jews from the beginning towards faith in Christ, preordaining for them this miracle of the pool. In these Judaic beliefs and practices God prefigured Baptism, which would contain great power and the gifts of cleansing sins and bringing souls to life. He had already given them water for the cleansing of stains, not of the fundamental stain, but those which appeared as such before (the New Covenant), such as the stain of touching a corpse, a leper, and so forth. Then He gave them this miracle of the pool, preparing them to receive Baptism. An angel would come down at certain times and trouble the water, infusing it with healing power. Truly, it is not the nature of water to heal by itself (if this were so it would invariably heal); it is entirely through the activity of the angel that the miracle was accomplished. So it is with us that the water of Baptism is simple water, which, through the invocations made to God, receives the grace of the Holy Spirit to free us from spiritual disease. And this water heals all: the blind, whose spiritual eyes are darkened and unable to discern the better from the worse; the lame, who can neither move towards doing good, nor even advance towards what is better; the withered, who are in total despair, and have no part in anything good. All are healed by the water of Baptism. Before, our very weakness had prevented us from being healed, but now there is no hindrance to our being baptized. In the waters of that pool just one was healed, while the others remained sick; now, even if the whole world should approach at once for Baptism, the grace would not diminish.