Acts 21:24

them take, and purify thyself with them i.e. make thyself one of their company, and observe all the ordinances, with regard to purification and keeping from what is unclean, which they observe.

and be at charges with(better, for) them Josephus (Antiq. xix. 6. 1) tells how Agrippa took upon him the expenses of many Nazarites. Cp. also Bell. Jud. ii. 15. 1, from which passage it appears that the whole time of the Nazarite's vow there mentioned was thirty days.

that they may shave their heads Which was done at the conclusion of the vow, and when the victims were offered, the hair was burnt in the fire which was under the sacrifice of the peace-offering. The charges which had to be borne by St Paul would be the cost of the victims and other things connected with the sacrifice.

and all may know The oldest texts read, "and all shall know."

that those things, whereof they were informed concerning thee, are nothing Rev. Ver."that there is no truth in the things whereof they have been informed concerning thee." The "are nothing" of the A. V. is an attempt to keep closer to the Greek, and means "have no foundation in fact." Cp. Acts 25:11.

but that … and keepest(Rev. Ver. keeping) the law The participial clause expresses the nature of the orderly walk. It was in the special manner which the Jews so regarded.