Ecclesiastes 10:2

A wise man's heart inclines him to the right, but a fool's heart to the left.

The wisdom of the prudent is to discern his way, but the folly of fools is deceiving.

Why should a fool have money in his hand to buy wisdom when he has no sense?

Whatever your hand finds to do, do it with your might,for there is no work or thought or knowledge or wisdom in Sheol, to which you are going.

If the iron is blunt, and one does not sharpen the edge, he must use more strength, but wisdom helps one to succeed.

A fool multiplies words, though no man knows what is to be, and who can tell him what will be after him?

And he said, 'I will do this: I will tear down my barns and build larger ones, and there I will store all my grain and my goods.

For which of you, desiring to build a tower, does not first sit down and count the cost, whether he has enough to complete it?

Treasury of Scripture Knowledge

A wise man's heart is at his right hand; but a fool's heart at his left.

If the iron is blunt, and one does not sharpen the edge, he must use more strength, but wisdom helps one to succeed.

Why should a fool have money in his hand to buy wisdom when he has no sense?

And he said, 'I will do this: I will tear down my barns and build larger ones, and there I will store all my grain and my goods.

But he abandoned the counsel that the old men gave him and took counsel with the young men who had grown up with him and stood before him.