Proverbs 30:18

There be three things which are too wonderful for me, yea, four which I know not:
– Proverbs 30:18

Verses 18-20 give another numerical list saying where the list items are related in some way. This list is in the common form of three and four. It is unique in that verse 20 seems to give a fifth item, but it isn’t a fifth item. Verse 20 is a conclusion that explains the reason and function of the list in verse 19.

The word for wonderful means causing wonder and the sense is being too difficult to understand, which is further highlighted by the indication of not knowing at the end of the verse. The point of the list is the observance of things beyond the comprehension of the ponderer.