Matthew
Matthew 24:12ESV·traditional attribution

And because lawlessness will be increased, the love of many will grow cold.

John Calvin Reformed @genevareformer

12 Because iniquity will abound. How far and wide this evil extends every person ought to know, but there are very few who observe it. For in consequence of the superior clearness with which the light of the gospel discovers the malice of men, even good and properly regulated minds grow cool, and almost lose the desire to exercise benevolence.

John Gill Reformed Baptist @doctorgill

And because iniquity shall abound,.... Meaning, either the malice and wickedness of outrageous persecutors, which should greatly increase; or the treachery and hatred of the apostates; or the errors and heresies of false teachers; or the wickedness that prevailed in the lives and conversations of some, that were called Christians: for each of these seem to be hinted at in the context, and may be...

Albert Barnes Presbyterian @notesbybarnes

Verse 12. And because iniquity, etc. The word iniquity here seems to include the cruelty of the Jews and Romans in their persecutions; the betraying of Christians by those who professed to be such; and the pernicious errors of false prophets and others. The effect of all this would be, that the ardour of feeling of many Christians would be lessened. The word wax means to become.