'Foolish' in the Bible

So I decided to discern the benefit of wisdom and knowledge over foolish behavior and ideas; however, I concluded that even this endeavor is like trying to chase the wind!

Of laughter I said, 'Foolish!' and of mirth, 'What is this it is doing?'

I made a search with my heart to give pleasure to my flesh with wine, still guiding my heart with wisdom, and to go after foolish things, so that I might see what was good for the sons of men to do under the heavens all the days of their life.

Next, I decided to consider wisdom, as well as foolish behavior and ideas. For what more can the king's successor do than what the king has already done?

Then I saw that wisdom is better than foolish ways--as the light is better than the dark.

The wise man's eyes are in his head, but the foolish man goes walking in the dark; but still I saw that the same event comes to them all.

Then said I in my heart: As it comes to the foolish man, so will it come to me; so why have I been wise overmuch? Then I said in my heart: This again is to no purpose.

Of the wise man, as of the foolish man, there is no memory for ever, seeing that those who now are will have gone from memory in the days to come. See how death comes to the wise as to the foolish!

And who knows whether he will be wise or foolish? Either way, he will take possession of everything that I have done on earth, especially where I have excelled. This also is pointless.

The foolish man, folding his hands, takes the flesh of his body for food.

Better is a poor and a wise child than an old and foolish king, who will no more be admonished.

Put your feet down with care when you go to the house of God, for it is better to give ear than to make the burned offerings of the foolish, whose knowledge is only of doing evil.

As a dream comes from much business, so the voice of a foolish man comes with words in great number.

When you take an oath before God, put it quickly into effect, because he has no pleasure in the foolish; keep the oath you have taken.

What have the wise more than the foolish? and what has the poor man by walking wisely before the living?

Who is able to say what is good for man in life all the days of his foolish life which he goes through like a shade? who will say what is to be after him under the sun?

The hearts of the wise are in the house of weeping; but the hearts of the foolish are in the house of joy.

It is better to take note of the protest of the wise, than for a man to give ear to the song of the foolish.

Like the cracking of thorns under a pot, so is the laugh of a foolish man; and this again is to no purpose.

Unjust gain makes the wise foolish, and a bribe corrupts the heart.

Be not quick to let your spirit be angry; because wrath is in the heart of the foolish.

Be not over much wicked, neither be thou foolish: why shouldest thou die before thy time?

I gave my mind to knowledge and to searching for wisdom and the reason of things, and to the discovery that sin is foolish, and that to be foolish is to be without one's senses.

This is evil in all things which are done under the sun: that there is one fate for all, and the hearts of the sons of men are full of evil; while they have life their hearts are foolish, and after that--to the dead.

Have joy with the woman of your love all the days of your foolish life which he gives you under the sun. Because that is your part in life and in your work which you do under the sun.

The words of the wise which come quietly to the ear are noted more than the cry of a ruler among the foolish.

Dead flies make the oil of the perfumer give out an evil smell; more valued is a little wisdom than the great glory of the foolish.

A wise man’s heart directs him toward the right, but the foolish man’s heart directs him toward the left.

And when the foolish man is walking in the way, he has no sense and lets everyone see that he is foolish.

The foolish are placed in high positions, but men of wealth are kept low.

The words of a wise man's mouth are sweet to all, but the lips of a foolish man are his destruction.

At the beginning his words are foolish and at the end his talk is wicked madness,

The foolish are full of words; man has no knowledge of what will be; and who is able to say what will be after him?

The labour of the foolish wearieth every one of them, because he knoweth not how to go to the city.