KJV: When I applied mine heart to know wisdom, and to see the business that is done upon the earth: (for also there is that neither day nor night seeth sleep with his eyes:)
NASB: When I gave my heart to know wisdom and to see the task which has been done on the earth (even though one should never sleep day or night),
KJV: Live joyfully with the wife whom thou lovest all the days of the life of thy vanity, which he hath given thee under the sun, all the days of thy vanity: for that is thy portion in this life, and in thy labour which thou takest under the sun.
NASB: Enjoy life with the woman whom you love all the days of your fleeting life which He has given to you under the sun; for this is your reward in life and in your toil in which you have labored under the sun.
KJV: But if a man live many years, and rejoice in them all; yet let him remember the days of darkness; for they shall be many. All that cometh is vanity.
NASB: Indeed, if a man should live many years, let him rejoice in them all, and let him remember the days of darkness, for they will be many. Everything that is to come will be futility.
KJV: Rejoice, O young man, in thy youth; and let thy heart cheer thee in the days of thy youth, and walk in the ways of thine heart, and in the sight of thine eyes: but know thou, that for all these things God will bring thee into judgment.
NASB: Rejoice, young man, during your childhood, and let your heart be pleasant during the days of young manhood. And follow the impulses of your heart and the desires of your eyes. Yet know that God will bring you to judgment for all these things.
KJV: Remember now thy Creator in the days of thy youth, while the evil days come not, nor the years draw nigh, when thou shalt say, I have no pleasure in them;
NASB: Remember also your Creator in the days of your youth, before the evil days come and the years draw near when you will say, "I have no delight in them";
KJV: In the day when the keepers of the house shall tremble, and the strong men shall bow themselves, and the grinders cease because they are few, and those that look out of the windows be darkened,
NASB: in the day that the watchmen of the house tremble, and mighty men stoop, the grinding ones stand idle because they are few, and those who look through windows grow dim;
KJV: Go forth, O ye daughters of Zion, and behold king Solomon with the crown wherewith his mother crowned him in the day of his espousals, and in the day of the gladness of his heart.
NASB: "Go forth, O daughters of Zion, And gaze on King Solomon with the crown With which his mother has crowned him On the day of his wedding, And on the day of his gladness of heart."