Ecclesiastes 1:18

Grief. The word thus translated is from a root meaning “to be vexed,” “to be provoked.” Overstudy brings on sleeplessness, frayed nerves, and sometimes ill-health. However, it must not be concluded that Solomon endorses the idea that ignorance is bliss (see Prov. 4:7).

Sorrow. Literally, “pain,” both mental and physical. If one desires wisdom, he must dig deeply (see Prov. 2:4); and constant digging and research take their toll of health and strength. It is also true that even great knowledge is not an index to character. The righteousness of Jesus Christ received by faith opens the door to the heavenly kingdom, and knowledge alone cannot accomplish this.