Message of The Signs, part 2

Moses' hand is made leprous when he puts it into his bosom and removes it again. His hand is made whole when it is put back into his bosom the second time and plucked out.

The clean made leprous: man guilty and corrupt before God's holy law and in their conscience.

The leprous made clean: sinners cleansed before God when Christ took the disease of their sin to Himself, bore it in His own body under the suffering and death of the cross. Subsequently, in their experience, the Spirit of God applies the atonement of Christ to guilty sinners when He sprinkles Christ's blood on the conscience in the new birth.