Charles H. Spurgeon on Psalms 34:1

I will bless the Lord at all times. He is resolved and fixed, I will; he is personally and for himself determined, let others so as they may; he is intelligent in head and inflamed in heart —he knows to whom the praise is due, and what is due, and for what and when. To Jehovah, and not to second causes our gratitude is to be rendered. The Lord hath by right a monopoly in his creatures praise. Even when a mercy may remind us of our sin with regard to it, as in this case David's deliverance from the Philistine monarch was sure to do, we are not to rob God of his meed of honour because our conscience justly awards a censure to our share in the transaction. Though the hook was rusty, yet God sent the fish, and we thank him for it. At all times, in every situation, under every circumstance, before, in and after trials, in bright days of glee, and dark nights of fear. He would never have done praising, because never satisfied that he had done enough; always feeling that he fell short of the Lord's deservings. Happy is he whose fingers are wedded to his harp. He who praises God for mercies shall never want a mercy for which to praise. To bless the Lord is never unseasonable. His praise shall continually be in my mouth, not in my heart merely, but in my mouth too. Our thankfulness is not to be a dumb thing; it should be one of the daughters of music. Our tongue is our glory, and it ought to reveal the glory of God. What a blessed mouthful is God's praise! How sweet, how purifying, how perfuming! If men's mouths were always thus filled, there would be no repining against God, or slander of neighbours. If we continually rolled this dainty morsel under our tongue, the bitterness of daily affliction would be swallowed up in joy. God deserves blessing with the heart, and extolling with the mouth —good thoughts in the closet, and good words in the world.