Good News Translation
Only someone with very little sense, and foolishly misguided, would think things like that.

New Revised Standard Version
Such are the thoughts of one devoid of understanding; a senseless and misguided person thinks foolishly.

Contemporary English Version
That is how fools speak-- they cannot think straight and have no understanding.

New American Bible
Such the thoughts of the senseless; only the foolish entertain them.

Douay-Rheims Bible
He that wanteth understanding thinketh vain things, and the foolish, and erring man, thinketh foolish things.

He that wanteth understanding thinketh vain things, and the foolish, and erring man, thinketh foolish things.

Sirach 16:21
And his ways who shall understand, and the storm, which no eye of man shall see?

Sirach 16:22
For many of his works are hidden, but the works of his justice who shall declare? or who shall endure? for the testament is far from some, and the examination of all is in the end.

Sirach 16:24
Hearken to me, my son, and learn the discipline of understanding, and attend to my words in thy heart.

Sirach 16:25
And I will shew forth good doctrine in equity, and will seek to declare wisdom: and attend to my words in thy heart, whilst with equity of spirit I tell thee the virtues that God hath put upon his works from the beginning, and I shew forth in truth his knowledge.