It’s not that Jesus isn’t big enough for each temptation and situation; it’s just that we aren’t small enough to trust Him. We waste so much time not depending on Him, and exhausting ourselves by our own sincere best effort. That’s the way lost people live; doing there best. Becoming a Christian doesn’t mean that you just get a new heart so that you, still doing your best, are now trying to do good stuff from God’s perspective. Your best, sincere, self effort is just as powerless now, as a Christian, as it was when you were lost. Being a Christian is not “an imitation of Christ” by trying hard to be like Him, now that, with a new heart, you want to. Christianity is receiving a Person who has a new supernatural power to do good, and He lives inside of you, releasing that power in you, and through you. For that to work, you have to own your “smallness,” and in absolute dependent faith look to Him for His best effort. This is the “I can’t, You can” principle” that releases His ability. It’s spelled out in John 12:24, “Truly, truly, I say to you, unless again of wheat falls into the earth and dies, it remains alone; but if it dies, it bears much fruit.” At each step, we must fall down in humility, admitting we can’t, and thank Him that He alone can. That’s where fruit that He produces comes from. We just bear the fruit. He produces it.