Charles H. Spurgeon on Psalms 54:6

I will freely sacrifice unto thee. Spontaneously will I bring my freewill offerings. So certain is he of deliverance that he offers a vow by anticipation. His overflowing gratitude would load the altars of God with victims cheerfully presented. The more we receive, the more we ought to render. The spontaneousness of our gifts is a great element in their acceptance; the Lord loveth a cheerful giver. I will praise thy name, O Lord. As if no amount of sacrifice could express his joyful feelings, he resolves to be much in vocal thanksgiving. The name which he invoked in prayer (Ps 54:1), he will now magnify in praise. Note how roundly he brings it out: O Jehovah. This is ever the grand name of the revealed God of Israel, a name which awakens the most sublime sentiments, and so nourishes the most acceptable praise. None can praise the Lord so well as those who have tried and proved the preciousness of his name in seasons of adversity. The psalmist adds, for it is good, and surely we may read this with a double nominative, God's name is good, and so is his praise. It is of great use to our souls to be much in praise; we are never so holy or so happy as when our adoration of God abounds. Praise is good in itself, good to us, and good to all around us. If David's enemies are described in Ps 54:3 as not setting God before them, he here declares that he is of a different mind from them, for he resolves to have the Lord in perpetual remembrance in his sacrifices and praises.