'Simple minded' in the Bible

To make the simple-minded sharp, and to give the young man knowledge, and serious purpose:

“Leave [behind] your foolishness [and the foolish] and live,And walk in the way of insight and understanding.”

You shall do this on the seventh [day] of the month for everyone who goes astray [and sins through error or ignorance] and for him who is naive; so shall you make atonement for the temple (house).