Wise teaching: Fools show their stupidity by the way they live; it's easy to see they have no sense. Ecclesiastes 10:3
The Book of Ecclesiastes, along with the Book of Proverbs and the Book of Wisdom, is a book whose authorship is attributed to King Solomon, one of the wisest men who existed in the ancient world. In this sapiential book, the author explained what the object of his study was: "I applied my heart to know wisdom and to know madness and folly" Ecclesiastes 1:17.
King Solomon's study was ultimately about the ways of discerning that exist in man, because just as there is an edifying, benevolent, and progressive way related to the fear of God (constancy, firmness, devotion), there is also one that is destructive and chaotic related to the foolishness. And this study is very typical of wise men because ultimately, what is studied in these cases is the role of truth and falsehood in the minds of men.
And just as the great king praised the wise man in his book, he also condemned the fool: "It is natural for the wise to do the right thing and for fools to do the wrong thing" Ecclesiastes 10:2. With this, the author of the book explained that if a person wants to achieve true happiness and well-being, that person must seek out the wise and avoid the foolish. The book also taught that not all people are equal in relation to Providence, and that God distributes his grace or his gifts as he wishes; to some people God gives more gifts and to others less, as happens with the gift of wisdom.
And the wise man continued his study and wrote a wise teaching to keep in mind: "Fools show their stupidity by the way they live; it's easy to see they have no sense" Ecclesiastes 10:3. With this, the wise man pointed out something very important in spiritual terms, what characterizes foolishness is the lack of common sense. What common sense did Cain have when he took the life of his brother Abel in the Book of Genesis? Cain sinned knowingly, having been warned by God, and ultimately accepted his punishment. Cain had a very rigid, egocentric way of thinking, and no empathy whatsoever, and this is the fundamental essence of foolishness. With this phrase about foolishness, Solomon ultimately reflected indirectly on the importance of seeking wisdom to live.

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