In these three verses, each beginning in the Hebrew with the word good, we have first the fundamental idea that Yahweh Himself is good, and if good to all, then especially is He so to those who being in adversity can yet wait in confidence upon His mercy.
And quietly wait - literally, “and be in silence,” i. e. abstain from all complaining.
The yoke - Or, a “yoke.” By bearing a yoke in his youth, i. e. being called upon to suffer in early age, a man learns betimes the lesson of silent endurance, and so finds it more easy to be calm and patient in later years.