The simple believes every word, but the prudent considers well his steps.
“A characteristic of the naïve person is gullibility” (Nelson’s NKJV Study Bible, note on Proverbs 14:15). Sadly, many shrewd and deceitful people take advantage of that gullibility. This can result in being misled, cheated and worse.
The prudent or wise person knows that something that seems too good to be true probably is. He or she is skeptical of easy answers and products that promise to solve a multitude of problems.
Carefully considering our choices, studying the alternatives, testing the claims—these can lead to wiser decisions.