This verse illustrates the Lord's power and majesty and His presence throughout the universe. It is a reminder of the limitless scope of God's rule, from the highest heavens to the depths of the sea, and the constant care He provides for all His creatures. The psalmist gives voice to the awe-inspiring reality of God's ever-present rule, enlightening us of His might and grace that are evident in every aspect of our lives.
The Lord has the ability to see into the depths of our hearts and understand the thoughts and meditations within us. No one can truly know the secrets of our mind, but the Lord is aware of both the good and evil within us. When we direct our hearts towards the Lord, we find a solid foundation to rest upon, secure in His understanding and love.
When the Lord Jesus Christ is the center of our thoughts and heart's meditations, we will be pleasing to Him, as we are directed to fix our hearts' gaze on Jesus. By singing with all our being about the wonders of His boundless grace and reveling in the happiness of our salvation, our thoughts will be acceptable to the Lord, and our hearts will bask in the delight of our Redeemer God.

Dear Heavenly Father, I lift my heart and thoughts to You, knowing that You understand the deep meditations of my inner being. I want my mind and heart to always focus on Your glory, Jesus Christ, the Author and Finisher of my faith. I offer You my song of thanksgiving for Your amazing grace and the joy of my salvation. May my thoughts and praises always be pleasing to You and bring me joy as I glorify You, my God and Saviour.
In Jesus's name I pray. Amen.