day no. 16,312: there is nothing harder than a human heart

Zechariah 7:12

They made their hearts diamond-hard lest they should hear the law and the words that the LORD of hosts had sent by his Spirit through the former prophets. Therefore great anger came from the LORD of hosts.

There is nothing harder than a human heart. A diamond can't even scratch its surface. It can only be pierced by the Word of God. Just as a diamond cannot be scratched except by another diamond, a heart cannot be cut except by another heart. The heart of Christ is the only substance strong enough to cut through the crust of the human heart.

Acts 2:36-37

"Let all the house of Israel therefore know for certain that God has made him both Lord and Christ, this Jesus whom you crucified.” Now when they heard this they were cut to the heart, and said to Peter and the rest of the apostles, “Brothers, what shall we do?”

The heart of Christ can cut through human hardness like a hot knife through room temperature butter. The Gospel of God does not break a sweat breaking through the pretenses of men. It cuts through all the religious red-tape and gets to the heart of the matter.

Romans 2:5

Because of your hard and impenitent heart you are storing up wrath for yourself on the day of wrath when God’s righteous judgment will be revealed.

We hide behind the hardness of our hearts, hoping that it's recalcitrance will keep us safe.  We make them as hard as we can in the hope that it can shield us from the wrath to come. But there is, as it turns out, something harder than the human heart: God's. 

Matthew 21:44

Whosoever shall fall on this stone shall be broken: but on whomsoever it shall fall, it will grind him to powder.

We will either be broken on Christ or by Him, but either way, we will be the ones who give way. He is the One from whom the rocks borrow their resolution. He is the One who holds the hammer and anvil together. He is the strength on which mountains stand their ground and by which mountains are tossed into the sea. He is inexorable.

Ezekiel 36:26

And I will give you a new heart, and a new spirit I will put within you. And I will remove the heart of stone from your flesh and give you a heart of flesh.

We all will either be broken to pieces and put back together or shattered to bits and left undone. The stone will fall on the hard hearts of man one way... or the other until all pride is abolished.