His old enemies in Jerusalem had not laid aside their hostility toward him. Therefore no proof by Paul could be favorable for him there.
Not without reason had the Caesarean Christians brought him to the secluded dwelling of Mnason, a Cypriot known to almost no one.
It was not difficult for the Apostle to accept the advice given to him. The purification that he was to perform together with the others was, in general, a good thing.
In particular, it was good that those fulfilling the vow of temporary Nazirite observance had to cut their hair. He himself had done this earlier (see Acts 18:18).
“Hair was a symbol of mortification because, being dead, it does not feel pain. It was customary that those who had taken a vow, after purification, cut their head and, in this state, made offerings for themselves for seven days.”
“Taking upon oneself such expenses for poor Nazirites, in the opinion of the Jews, especially bore witness to zealous reverence for the law on the part of those who undertook it.
The cutting of the hair had to be performed at the temple, and the hair had to be thrown into the fire of the sacrifice.”
“As is evident from this, within the Jerusalem Christian community the laws of Moses were observed by Christians, even those given to each person’s good will as laws concerning voluntary vows.
This was not considered inconsistent with the Christian spirit and with life according to faith in Jesus Christ.”