This verse reminds us that we should enter His gates with thanksgiving and come into His courts with praise. By doing so, we acknowledge He is the source of all good things and that all blessings come from Him. It also shows our gratitude and thanks to Him for His many benefits and blessings. He deserves our worship and praise for who He is and all He has done for us. 
The Lord's goodness and mercy are eternal and unchanging, extending throughout all generations. Before the creation of the world, He had already made the plan to redeem humanity through the sacrifice of His beloved Son. By this gracious act, He restored the rule of mankind over His creation, through the power and achievement of His only begotten Son.
It is therefore imperative that the nations, both Jewish and Gentile, approach the gates of the Lord with a heart full of gratitude, and enter into His courts with praise. It is our duty to give thanks and to continually bless His name. This is made possible through faith in the Lord Jesus Christ, who through His sacrifice, has atoned for our sins and offers the word of eternal life.

Dear Heavenly Father,  I enter Your gates with thanksgiving in my heart and come into Your courts with praise. I give thanks to You and bless Your name forever. You are good and Your mercy and grace endure through all generations. I am grateful for Your grace that sought to redeem fallen mankind through the sacrifice of Your only begotten Son, Jesus Christ. I rejoice in the knowledge that through Him I am saved and free from the bondage of my sins.
In Jesus's name I pray. Amen.