Almost every householder has his toolbox.
1. CRAZY THINGS
2. THINGS FRACAS
V.27 we read the same: "and chose what is weak in the world
3. VIS THINGS, THAT ARE NOT despicable
Now in v.28 is written: "He chose it for the world is insignificant, and that nothing is overlooked ...".
4. FOR THAT NO FLESH should glory in his
It's what we read in v.29: "so that no one may boast before him."
God has His toolbox.
This way, no one can boast before God because the human capacity for God can accomplish nothing by itself, as a real tool can not fulfill its function if not used by someone.