for thereunto I applied my mind: that I might know what were wisdom and understanding, what were error and foolishness. And I perceived that this also was but a vexation of mind:

So I thought in my heart, to withdraw my flesh from wine, to apply my mind unto wisdom, and to comprehend foolishness until the time that among all the things which are under the Sun, I might see what were best for men to do, so long as they live under heaven.

applied my mind to seek out and search for the knowledge of all things that are done under heaven. Such travail and labor hath God given to the children of men, to exercise themselves therein.

And look whatsoever mine eyes desired, I let them have it: and wherein soever my heart delighted, or had any pleasure, I withheld it not from it. Thus my heart rejoiced in all that I did, and this I took for the portion of all my travail.

All these things have I proved because of wisdom: For I thought to be wise, but she went farther from me than she was before;

Examine all things, and keep that which is good.

Treasury of Scripture Knowledge

Summary

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

I perceived

Bible References

I gave

applied my mind to seek out and search for the knowledge of all things that are done under heaven. Such travail and labor hath God given to the children of men, to exercise themselves therein.
So I thought in my heart, to withdraw my flesh from wine, to apply my mind unto wisdom, and to comprehend foolishness until the time that among all the things which are under the Sun, I might see what were best for men to do, so long as they live under heaven.
All these things have I proved because of wisdom: For I thought to be wise, but she went farther from me than she was before;
Examine all things, and keep that which is good.

I perceived

And look whatsoever mine eyes desired, I let them have it: and wherein soever my heart delighted, or had any pleasure, I withheld it not from it. Thus my heart rejoiced in all that I did, and this I took for the portion of all my travail.

General references

Thus I have considered all the things that come to pass under the Sun, and lo, they are all but vanity and vexation of mind.
Many things there be that increase vanity, and what hath a man else?
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