“My son, keep my sayings, and may you treasure up my own commandments with you. Keep my commandments and continue living, and my law like the pupil of your eyes.”—Proverbs 7:1, 2.
The king is talking. He is giving fatherly advice. (Proverbs 4:1) He is inculcating into his listeners the need to be careful when it comes to certain people acting immorally, but he is also showing their method of operation. Respect these commandments, which could be God’s Word, or the sayings of a god-fearing parent, perhaps family rules. ‘Treasure up’ these commandments because they mean your life. (Leviticus 18:5; Isaiah 55:3; John 12:50) In fact, react the same way you would if someone tries to hurt or even touch the pupil of your eye. If we, as avid bible students, listen to God’s Word, the Word of Our Father, ‘with a fine and good heart, retain it and bear fruit with endurance’ we will win the race.—Luke 8:15.
Regarding the translation choice here of ‘pupil’ instead of ‘apple’, which is common in certain English translations, such as King James: It is of no great significance, but lies closer to the original language. The expression ‘apple of the eye’ finds its roots back in the 800s, but Shakespeare, the King James Bible, and then Sir Walter Scott, made it popular and brought the expression into the English language. We ought to keep God’s Word as if we could not live without it. In fact, we cannot live without it. Protect its place inside of you.