Regret and repent are two different things. Although some do repent and backslide. It happens. Regret doesn’t include God in the equation but repent does.
Yeah..
Some who have been to semetary, er, seminary will say that repentence is "μετάνοια" - metanoia..
Literally translated it means "change the mind". In its usage in the Koine of the New Testament it means a change in the trend and action of the whole inner nature, intellectual, affectional and moral. (This as opposed to classical Greek use that implied only a change of mind - "I was going to have the escargot, but I changed my mind, I'll have the Filet Mignon instead"..) In the Biblical usage it presumes a change in mind, heart, and life wrought by the Spirit of God.
Mere regret gives you the wiggle room to repeat the action that you regret, a concept that most 'regretters' take advantage of. Usually shortly after regretting...
Nutshell Greek lesson. There are those who argue that 'repent' is a mistranslation of the Greek. But good ol' King Jimmy renders it such and we know they are never wrong...
My interlinear Greek-English NT is not as heavy as some others 97 pound King Jimmy Scofields and thus is not too useful for beating someone into submission with...