Romans 2:28-29

for it is not the Jew in outward appearance, neither is it the external mark of circumcision:

Colossians 2:11

by whom also ye have obtain'd the true spiritual circumcision, not effected by men, when you were by a christian circumcision divested of all your carnal affections,

James 4:6-7

on the contrary, he heaps his favours upon you. wherefore 'tis said, "God defeats the proud, but is gracious to the humble."

Treasury of Scripture Knowledge

Summary

Circumcise therefore the foreskin of your heart, and be no more stiffnecked.

Stiff-necked

Bible References

Stiff-necked

James 4:6
on the contrary, he heaps his favours upon you. wherefore 'tis said, "God defeats the proud, but is gracious to the humble."