What is the difference between infirmities and sins? Christ can be touched with the feeling of my infirmities, but He never had any sins, or any sympathy with them. I can get help for my infirmities, and in a sense can glory in them, but I could not in my sins.
There are two kinds of temptations. One is from without, all the difficulties of Christian life; Christ went through them and He has gone through more than any of us. But the other kind of temptation is when a man is drawn away of his own lust and enticed. Christ, of course, never had that.
You want the hatchet of Scripture for these latter; the Word of God discerns the thoughts and intents of the heart, and so helps us in that way to go through the wilderness.