John 7:14

"Now about the middle of the feast Jesus went up and taught." By the delay He made them more attentive; for they who had sought Him on the first days and said, "Where is He?" when they saw Him suddenly present, observe how they drew near, and were like to press upon Him as He was speaking, both those who said that He was a good man, and those who said that He was not such; the former so as to profit by and admire Him, the latter to lay hold on and detain Him. One party then said, "He deceiveth the people," by reason of the teaching and the doctrines, not understanding His meaning; the other on account of the miracles said, "He is a good man." He therefore thus came among them when He had slackened their anger, so that they might hear His words at leisure, when passion no longer stopped their ears.

Then afterwards the Lord went up to the feast, "about the middle of the feast, and taught." He who was in secret taught, He was speaking openly and was not restrained. For that hiding of Himself was for the sake of example; this showing Himself openly was an intimation of His power.

(Tract. xxviii. s. 8.) The feast seems, as far as we can judge, to have lasted several days. And therefore it is said, "about the middle of the feast day:" i. e. when as many days of that feast had passed, as were to come. So that His assertion, I go not up yet to this feast day, (i. e. to the first or second day, as you would wish me,) was strictly fulfilled. For He went up afterwards, about the middle of the feast. (de Quaest. Nov. et Vet. Test. 2. 78) In going there too, He went up, not to the feast day, but to the light. They had gone to enjoy the pleasures of the festival, but Christ's feast day was that on which by His Passion He redeemed the world. (super Joan. Tract. xxix. 2) He who had before concealed Himself, taught and spoke openly, and was not laid hold on. The one was intended for an example to us, the other to testify His power.

At the commencement of the feast, men would be attending more to the preachings of the festival itself; and afterwards would be better disposed to hear Christ.