Simplify the following text for a Grade 9 native English-speaking person.
Original: Piper advocates Christian hedonism and teaches that `` God is most glorified in us when we are most satisfied in Him '' and that God 's highest pursuit ( `` his glory '' ) and man 's deepest and most durable happiness come together in one pursuit -- namely , the pursuit of joy in God .
Simplified: Piper calls himself a Christian Hedonist and teaches that `` God is most glorified in us when we are most satisfied in him . '' He also teaches that God 's highest pursuit and man 's deepest happiness are the same in one pursuit â `` namely , `` the pursuit of joy in God . ''