I could write a LOT about this matter, but it does speak to the reality of what The Word deals with in regards to our "internal" temptations, and of whom they are from.
It is actually much easier to "resist" temptations when we know they are not of us, and not from ourselves. I was basically "forced" to engage this, after a serious bout of "sin hunting" in my own life, in the efforts to eradicate sin.
I became stonewalled in the arena of internal temptations, and could NOT stop them from randomly transpiring. Then I had to ask myself what was really going on.
Then, I discovered Paul's statements about these matters, step by step. Romans 7:7-13. Great example. The Word of Law is sown, and immediately thoughts of resistance followed in Paul's mind.
In Romans 7 Paul states that he did things he did not want to do, even doing evil. And force wrestles and pins this down to 'sin indwelling" our own flesh, seemingly with a "mind" of it's own. He says that indwelling sin is NOT HIM. And concludes that evil was in fact present with(in) himself. (Romans 7:21) That evil can do no other than to resist everything about God in Christ. Paul goes well into this matter even further, showing that in his own flesh, there was a "messenger of Satan." (2 Cor. 12:7) And this, I believe, are the temptations of the tempter (or his own, his family if you prefer.) Paul delineated that this "temptation" was in fact, literally "in his own flesh." (Gal. 4:14) This led to Paul's sight of himself as "the chief of sinners" in 1 Tim. 1:15, because he recognizes that Paul was not just Paul. It was Paul and the tempter, internally. When Paul made that statement he was looking at the reality of his "internal self." And it was not just him.
Apostles are 'singled out' just as Paul was, for even greater internal resistance by our mutual adversary. If we observe that we are sinners, and that sin is in fact just as John notes in 1 John 3:8, "of the devil" the math really isn't all that difficult to put together here.
Yet, we find in this reality, that GOD'S GRACE is sufficient for us, REGARDLESS. That does not mean Gods Grace is upon the tempter however.