New King James Version
I applied my heart to know, To search and seek out wisdom and the reason of things, To know the wickedness of folly, Even of foolishness and madness.

King James Bible
I applied mine heart to know, and to search, and to seek out wisdom, and the reason of things, and to know the wickedness of folly, even of foolishness and madness:

American Standard Version
I turned about, and my heart was set to know and to search out, and to seek wisdom and the reason of things , and to know that wickedness is folly, and that foolishness is madness.

Berean Study Bible
I directed my mind to understand, to explore, to search out wisdom and explanations, and to understand the stupidity of wickedness and the folly of madness.

Douay-Rheims Bible
I have surveyed all things with my mind, to know, and consider, and seek out wisdom and reason: and to know the wickedness of the fool, and the error of the imprudent:

English Revised Version
I turned about, and my heart was set to know and to search out, and to seek wisdom and the reason of things, and to know that wickedness is folly, and that foolishness is madness:

World English Bible
I turned around, and my heart sought to know and to search out, and to seek wisdom and the scheme of things, and to know that wickedness is stupidity, and that foolishness is madness.

Young's Literal Translation
I have turned round, also my heart, to know and to search, and to seek out wisdom, and reason, and to know the wrong of folly, and of foolishness the madness.

Ecclesiastes 7:25 Additional Translations ...