The deepest happiness comes from being personally connected with God.

In Your presence is fullness of joy; at Your right hand are pleasures forevermore.—Psalm 16:11

Let all those who seek You rejoice and be glad in You.—Psalm 40:16

Happy are the people whose God is the Lord!—Psalm 144:15

“These things I [Jesus] have spoken to you, that My joy may remain in you, and that your joy may be full.”—John 15:11