Psalm 40:16

But may all who seek you rejoice and be glad in you; may those who long for your saving help always say, "The LORD is great!"

But may all who seek you 
Deuteronomy 4:29  But if from there you seek the LORD your God, you will find him if you seek him with all your heart and with all your soul.
1 Chronicles 28:9  "And you, my son Solomon, acknowledge the God of your father, and serve him with wholehearted devotion and with a willing mind, for the LORD searches every heart and understands every desire and every thought. If you seek him, he will be found by you; but if you forsake him, he will reject you forever."
Psalm 9:10  Those who know your name trust in you, for you, LORD, have never forsaken those who seek you.
Psalm 119:2-3  Blessed are those who keep his statutes and seek him with all their heart--they do no wrong but follow his ways.

rejoice and be glad in you 
Psalm 9:2  I will be glad and rejoice in you; I will sing the praises of your name, O Most High.

"The LORD is great!" 
Psalm 35:27  May those who delight in my vindication shout for joy and gladness; may they always say, "The LORD be exalted, who delights in the well-being of his servant."

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
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