Christian Hedonism is a relatively new term for an old truth of the faith, John Piper the one who came up with the term describes it thus:
God is most glorified in us when we are most satisfied in Him.
Both the Westminster Shorter Catechism and the Heidelberg Catechism draw out this idea in their opening questions and answers.
A brief summation of the Doctrines of Grace is that in His self-glorification God has saved for himself a specific people. So it logically follows that those specific people having been saved by God for His glorification find their satisfaction in Him and His glorification. God changes their hearts from ones that are in violent rebellion against Him to ones that seek Him. If we seek His glorification and are part of God’s people we are most definitely going to be satisfied in Him. On the other hand if we are not of His people and we grudgingly try to seek His glorification, He will not be glorified and there is nothing that can satisfy us in Him. Oh you people taste and see that He is good, does He not hold all things together, His glorification is satisfying deep to the depths of my soul.
The nations will know that I am the Lord, declares the Lord God, when through you I vindicate my holiness before their eyes. I will take you from the nations and gather you from all the countries and bring you into your own land. I will sprinkle clean water on you, and you shall be clean from all your uncleannesses, and from all your idols I will cleanse you. And I will give you a new heart, and a new spirit I will put within you. And I will remove the heart of stone from your flesh and give you a heart of flesh. And I will put my Spirit within you, and cause you to walk in my statutes and be careful to obey my rules. ((Ezekiel 36:23-27))