"All things" is an all-encompassing term - it gives me the blessed assurance that whatever happens, God's hand is over me and He'll sustain me through it, and bless me in it if I trust in Him. I can face what comes with cheerfulness if I'm in the good of that truth - I know that God is over all.
We have it in scripture that Paul had a physical weakness, a thorn in his flesh, which was to humble him. Paul could take pleasure in all kinds of suffering: "Wherefore I take pleasure in weaknesses, in insults, in necessities, in persecutions, in straits, for Christ: for when I am weak, then I am powerful." (2 Corinthians 12:10). When natural resources failed, divine ones came into evidence, and Paul rejoiced in that.
There is No scripture to back this thorn to humble Paul.
You quoted Paul saying when I am weak then I am powerful.. Hmm seems to me that Paul is saying when he cant - he can through Christ.