No one can say, “What is this?” “Why is that?”: This is exactly the same as verse 17a. See the comments there.

For everything has been created for its use: Good News Translation has “everything in creation has its purpose,” and Contemporary English Version says “he had a purpose in mind for each thing he created.”

Quoted with permission from Bullard, Roger A. and Hatton, Howard A. A Handbook on Sirach. (UBS Helps for Translators). New York: UBS, 2008. For this and other handbooks for translators see here.