The pouring ointment upon the head of Christ was a token of the highest respect. Where there is true love in the heart to Jesus Christ, nothing will be thought too good to bestow upon him. The more Christ's servants and their services are cavilled at, the more he manifests his acceptance.
This act of faith and love was so remarkable, that it would be reported, as a memorial of Mary's faith and love, to all future ages, and in all places where the gospel should be preached. This prophecy is fulfilled.