Zechariah 13:1 (NKJV)
1 “In that day a fountain shall be opened for the house of David and for the inhabitants of Jerusalem, for sin and for uncleanness.
I The mountains of sin which we all have
Psalm 51:5 (NKJV)
5 Behold, I was brought forth in iniquity, And in sin my mother conceived me.
II Be of sin the double cure
Ezekiel 36:25–27 (NKJV)
25 Then I will sprinkle clean water on you, and you shall be clean; I will cleanse you from all your filthiness and from all your idols. 26 I will give you a new heart and put a new spirit within you; I will take the heart of stone out of your flesh and give you a heart of flesh. 27 I will put My Spirit within you and cause you to walk in My statutes, and you will keep My judgments and do them.
III Only the God-man can bring about the double cure
Zechariah 13:7 (NKJV)
7 “Awake, O sword, against My Shepherd, Against the Man who is My Companion,” Says the Lord of hosts. “Strike the Shepherd, And the sheep will be scattered; Then I will turn My hand against the little ones.
Matthew 26:31 (NKJV)
31 Then Jesus said to them, “All of you will be made to stumble because of Me this night, for it is written: ‘I will strike the Shepherd, And the sheep of the flock will be scattered.’