21. he that sprinkleth . . . ; and he that toucheth the water of separation shall be unclean until even--The opposite effects ascribed to the water of separation--of cleansing one person and defiling another--are very singular, and not capable of very satisfactory explanation. One important lesson, however, was thus taught, that its purifying efficacy was not inherent in itself, but arose from the divine appointment, as in other ordinances of religion, which are effectual means of salvation, not from any virtue in them, or in him that administers them, but solely through the grace of God communicated thereby.

JFB.