Ecclesiastes 1:17

yea I have given my heart, to know wisdom, and to know madness, and folly, - I know that, even this, is a feeding on wind.

Ecclesiastes 2:3

I sought out with my heart, to cherish with wine, my flesh, - but, my heart, was to guide with wisdom, even in laying hold of folly, until I should see which was blessedness for the sons of men, as to that which they could do, under the heavens, during the number of the days of their life.

Ecclesiastes 1:13-14

And I gave my heart to seek and to search out, wisely, concerning all things which are done under the heavens, - the same, is the vexatious employment God hath given to the sons of men, to work toilsomely therein,

Ecclesiastes 2:10-12

and, nothing that mine eyes asked, withheld I from them, - I did not keep back my heart from any gladness, for, my heart, obtained gladness out of all my toil, and so, this, was my portion, out of all my toil.

Ecclesiastes 7:23-25

All this, have I proved by wisdom, - I said, I will be wise, but, that, was far from me.

1 Thessalonians 5:21

But, all things, put to the proof - what is comely, hold ye fast:

Treasury of Scripture Knowledge

Summary

Ecclesiastes 1:17

And I gave my heart to know wisdom, and to know madness and folly: I perceived that this also is vexation of spirit.

I gave

I perceived

Ecclesiastes 2:10

General references

Ecclesiastes 1:14

Ecclesiastes 6:11

Bible References

I gave

All this, have I proved by wisdom, - I said, I will be wise, but, that, was far from me.

But, all things, put to the proof - what is comely, hold ye fast:

I perceived

General references

I saw all the works which were done under the sun, - and lo! all, was vanity, and a feeding on wind.

Seeing there are things in abundance which make vanity abound, what profit hath man?