Ecclesiastes 2:15

and I said in my heart, 'As it happeneth with the fool, it happeneth also with me, and why am I then more wise?' And I spake in my heart, that also this is vanity:

Ecclesiastes 6:8

For what advantage is to the wise above the fool? What to the poor who knoweth to walk before the living?

1 Kings 3:12

lo, I have done according to thy words; lo, I have given to thee a heart, wise and understanding, that like thee there hath not been before thee, and after thee there doth not arise like thee;

Ecclesiastes 1:2

Vanity of vanities, said the Preacher, Vanity of vanities: the whole is vanity.

Ecclesiastes 1:14

I have seen all the works that have been done under the sun, and lo, the whole is vanity and vexation of spirit!

Ecclesiastes 1:16

I -- I spake with my heart, saying, 'I, lo, I have magnified and added wisdom above every one who hath been before me at Jerusalem, and my heart hath seen abundantly wisdom and knowledge.

Ecclesiastes 1:18-1

for, in abundance of wisdom is abundance of sadness, and he who addeth knowledge addeth pain.'

Ecclesiastes 2:16

That there is no remembrance to the wise -- with the fool -- to the age, for that which is already, in the days that are coming is all forgotten, and how dieth the wise? with the fool!

Treasury of Scripture Knowledge

Summary

Then said I in my heart, As it happeneth to the fool, so it happeneth even to me; and why was I then more wise? Then I said in my heart, that this also is vanity.

General references

Bible References

And why

Ecclesiastes 1:16
I -- I spake with my heart, saying, 'I, lo, I have magnified and added wisdom above every one who hath been before me at Jerusalem, and my heart hath seen abundantly wisdom and knowledge.
1 Kings 3:12
lo, I have done according to thy words; lo, I have given to thee a heart, wise and understanding, that like thee there hath not been before thee, and after thee there doth not arise like thee;

Then i

Ecclesiastes 2:1
I said in my heart, 'Pray, come, I try thee with mirth, and look thou on gladness;' and lo, even it is vanity.
Ecclesiastes 1:2
Vanity of vanities, said the Preacher, Vanity of vanities: the whole is vanity.

General references

Ecclesiastes 1:2
Vanity of vanities, said the Preacher, Vanity of vanities: the whole is vanity.