garee in Acts 21:18-26 (about ad57,,27 years after the Cross) James Paul and the others are still following the law of Moses and making offerings in the temple as if they saw it as still valid(your saying the opposite of what the apostles actions are)...
Yes as
if they saw it as a valid shadow . It lost its validity as a shadow when Jesus said it is finished .The veil was rent signaling our bloody Husband Christ had been cut off as the father bruised him for our iniquities. .
Paul was teaching against the law of the fathers a false zeal for knowing God .They insisted the reformation had not come and that the ceremonial laws were more than shadows . They sought after what the eyes see as a sign and evil generation (no faith) . Proving confirming they were walking by sight by murdering the misperceived competition as if we did wrestle against flesh and blood . They were now are looking to put Paul 6 feet under, as in out of sight out of mind (no faith)
The ceremony the believer spoke of would seems to of been a Nazarene vow which ends when the head is shaven .It seemed to be one of personal desire, no length of time, or length hair . Paul apparently had finished his
Acts 18:18And Paul after this tarried there yet a good while, and then took his leave of the brethren, and sailed thence into Syria, and with him Priscilla and Aquila; having
shorn his head in Cenchrea: for he had a
vow.
Acts 21:23-24 Do therefore this that we say to thee: We have four men which have a
vow on them; Them take, and purify thyself with them, and be at charges with them, that they may
shave their heads: and all may know that
those things, whereof they were informed concerning thee, are nothing; but that thou thyself also walkest orderly, and
keepest the law.
Above I believe the nothing as to a working affect profits as a shadow But that we keep our guard the moral law , not the ceremonial law which are nothing as substance.