“Let all those who seek You rejoice and be glad in You;
Let such as love Your salvation say continually,
‘The LORD be glorified!’”  Psalm 40:16

Psalm 40 is a Psalm of David and in my NKJV has entitled this Psalm 
“Delight To Do God’s Will”  Let’s see some things Scripture tells us of the seeker, rejoicing and glorifying the LORD.

‘Those who seek’
Psalm 24:6,
“This is Jacob, the generation of those who seek Him, Who seek Your face.  Selah”

“When You said, ‘Seek My face,’
My heart said to You, ‘Your face, LORD, I will seek.’”  Psalm 27:8

“With my whole heart I have sought You;
Oh, let me not wander from Your commandments!”  Psalm 119:10

“Then I set my face toward the LORD God to make request by prayer and supplications, with fasting, sackcloth, and ashes.”  Daniel 9:3

“But seek first God’s kingdom and all things will be added unto you.”
Matthew 6:33 

“Let him turn away from evil;
Let him seek peace and pursue it.”  1 Peter 3:11

‘those who seek, rejoice’
“But let all those rejoice who put their trust in You; 
Let them ever shout for joy, because You defend them;
Let those who love Your name be joyful in You.”  Psalm 5:11

“Be glad in the LORD and rejoice you righteous;
And shout for joy, all upright in heart!”  Psalm 32:11
And, Psalm 33:1,
Rejoice in the LORD , O you righteous!
For praise from the upright is beautiful.”

“…rejoice that your names are written in heaven”  Luke 10:20b

“Rejoice in the Lord always.  Again I will say rejoice!
Let your gentleness be known to all men.  The Lord is at hand.”
Philippians 4:4-5

‘the LORD be glorified’
By praise:
“You who fear the LORD, praise Him!
All you offspring of Jacob, glorify Him,
And stand in awe of Him, all you offspring of Israel!”  Psalm 22:23

By good works:
“In the same way, let your light shine before others, so that they may see your good works and give glory to your Father who is in heaven.”  
Matthew 5:16

By fruit bearing:
“By this My Father is glorified, that you bear much fruit and so prove to be My disciples.”  John 15:8

By spiritual unity:
“…that together you may with one voice glorify the God and Father of our Lord Jesus Christ.”  Romans 15:6

By entire consecration:
“for you were bought with a price.  So glorify God in your body.”
1 Corinthians 6:20

Thank you most gracious and glorious God for your Word, Christ Jesus, and your written word, inspired by the Holy Spirit, that ever teaches and guides we believers.  Oh how we love you and give you thanks O Lord. Amen