KJV: 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.
NASB: All this I have seen and applied my mind to every deed that has been done under the sun wherein a man has exercised authority over another man to his hurt.
KJV: Then I beheld all the work of God, that a man cannot find out the work that is done under the sun: because though a man labour to seek it out, yet he shall not find it; yea further; though a wise man think to know it, yet shall he not be able to find it.
NASB: and I saw every work of God, I concluded that man cannot discover the work which has been done under the sun. Even though man should seek laboriously, he will not discover; and though the wise man should say, "I know," he cannot discover.
KJV: For all this I considered in my heart even to declare all this, that the righteous, and the wise, and their works, are in the hand of God: no man knoweth either love or hatred by all that is before them.
NASB: For I have taken all this to my heart and explain it that righteous men, wise men, and their deeds are in the hand of God. Man does not know whether it will be love or hatred; anything awaits him.
KJV: All things come alike to all: there is one event to the righteous, and to the wicked; to the good and to the clean, and to the unclean; to him that sacrificeth, and to him that sacrificeth not: as is the good, so is the sinner; and he that sweareth, as he that feareth an oath.
NASB: It is the same for all. There is one fate for the righteous and for the wicked; for the good, for the clean and for the unclean; for the man who offers a sacrifice and for the one who does not sacrifice. As the good man is, so is the sinner; as the swearer is, so is the one who is afraid to swear.