Buy the truth, and sell it not; also wisdom, and instruction, and understanding.
Buy the truth - (Proverbs 4:5; Proverbs 4:7, notes; Isaiah 55:1.)
Sell it not - part with it for no consideration, money, pleasure, fame, ease; for it is incomparably more precious than all things else, being the one pearl of great price (Matthew 13:46).
Instruction - Hebrew, discipline.