O ye simple, understand wisdom: and, ye fools, be ye of an understanding heart.
– Proverbs 8:5
Simple means gullible or naïve. The simple person is thoughtless and careless. Fools are obstinately stupid in life. It is not a comment on their mental capacity, but rather their willfulness in foolishness. Wisdom is a broad term that means prudence, shrewdness, or discernment. Wisdom is thoughtful, deliberate, and careful. Understanding points more specifically to discernment and an understanding heart speaks of having good sense. The cry and design of wisdom is to give wisdom and understanding to the simple and the fools. All men are born simple and foolish. We must grow in wisdom and understanding by taking heed to the cry and words of wisdom.