this have I # 21_ECC_07_23 # All this have I proved by wisdom: I said, I will be wise; but it [was] far from me. 
this have I # 21_ECC_07_27 # Behold, this have I found, saith the preacher, [counting] one by one, to find out the account: 
this have I # 21_ECC_08_09 # All this have I seen, and applied my heart unto every work that is done under the sun: [there is] a time wherein one man ruleth over another to his own hurt.