“My heart is steadfast, I God, my heart is steadfast; I will sing, yes, I will sing praises! Awake, my glory! Awake, harp and lyre! I will awaken the dawn. I will give thanks to You, O Lord, among the peoples; I will sing praises to You among the nations. For Your lovingkindness is great to the heavens and Your truth endures to the clouds. Be exalted above the heavens, O God; Let Your glory be over all the earth.” – Psalm 57:7-11
A steadfast heart before the Lord is a heart that knows the Lord and trusts in Him. As David pens this psalm he erupts in praise for the Most-High God, worshipping Him for who He is. David cannot help but sing and shout forth praises to His Lord because He loves Him and is filled with thankfulness to Him. An attitude of worship directed towards the Lord is almost always followed by an attitude of thankfulness for what He has done. As David worships the Lord he will not do so in the seclusion of his own abode, rather he will declare the greatness of the Lord to all the nations! The Christian is to be one who spreads the greatness of his God to the world around Him, joyfully declaring to the world all that God has done.
The reason that David’s heart is steadfast before the Lord is because of his confidence in what the Lord has done for Him. The Lord has loved him, just as you loves you, with a love that reaches to the heavens. The love, truth, and greatness of God is higher and wider than we can imagine, greater than this very universe. Therefore we must be people who exalt God above all other things. Our God is a mighty God and even now, and in the ages to come, His glory will be displayed over all the earth.