KJV: Keep thy foot when thou goest to the house of God, and be more ready to hear, than to give the sacrifice of fools: for they consider not that they do evil.
NASB: Guard your steps as you go to the house of God and draw near to listen rather than to offer the sacrifice of fools; for they do not know they are doing evil.
KJV: For who knoweth what is good for man in this life, all the days of his vain life which he spendeth as a shadow? for who can tell a man what shall be after him under the sun?
NASB: For who knows what is good for a man during his lifetime, during the few years of his futile life? He will spend them like a shadow. For who can tell a man what will be after him under the sun?
KJV: In the day of prosperity be joyful, but in the day of adversity consider: God also hath set the one over against the other, to the end that man should find nothing after him.
NASB: In the day of prosperity be happy, But in the day of adversity consider-- God has made the one as well as the other So that man will not discover anything that will be after him.
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: And so I saw the wicked buried, who had come and gone from the place of the holy, and they were forgotten in the city where they had so done: this is also vanity.
NASB: So then, I have seen the wicked buried, those who used to go in and out from the holy place, and they are soon forgotten in the city where they did thus. This too is futility.
KJV: Because sentence against an evil work is not executed speedily, therefore the heart of the sons of men is fully set in them to do evil.
NASB: Because the sentence against an evil deed is not executed quickly, therefore the hearts of the sons of men among them are given fully to do evil.