Zech 12, 10 They shall mourn for him

(Zech 12, 10) They shall mourn for him

[10] I will pour out on the house of David and on the inhabitants of Jerusalem a spirit of grace and petition; and they shall look on him whom they have thrust through, and they shall mourn for him as one mourns for an only son, and they shall grieve over him as one grieves over a first-born.

(CCC 1432) The human heart is heavy and hardened. God must give man a new heart (Cf. Ezek 36:26-27). Conversion is first of all a work of the grace of God who makes our hearts return to him: "Restore us to thyself, O LORD, that we may be restored!" (Lam 5:21). God gives us the strength to begin anew. It is in discovering the greatness of God's love that our heart is shaken by the horror and weight of sin and begins to fear offending God by sin and being separated from him. The human heart is converted by looking upon him whom our sins have pierced (Cf. Jn 19:37; Zech 12:10): Let us fix our eyes on Christ's blood and understand how precious it is to his Father, for, poured out for our salvation, it has brought to the whole world the grace of repentance (St. Clement of Rome, Ad Cor. 7, 4: PG 1, 224).