If that is all a believer ever gave God, they will be deeply sorry they had refused to give Him something of real value. What did God say of one group who did the above, “they praise me with their lips but their hearts are far from me.”
This is only a part of what we give God as our praise of Him acknowledges His goodness, love, perfection and all the incredible things He has done for us. It's not so much that He needs it, but that He deserves it. Those who give praise to the Lord give from their heart of gratitude, but yet many only give lip service to the Lord.
Psa 100:1 A Psalm of praise. Make a joyful noise unto the LORD, all ye lands.
Psa 100:2 Serve the LORD with gladness: come before his presence with singing.
Psa 100:3 Know ye that the LORD he is God: it is he that hath made us, and not we ourselves; we are his people, and the sheep of his pasture.
Psa 100:4 Enter into his gates with thanksgiving, and into his courts with praise: be thankful unto him, and bless his name.
Psa 100:5 For the LORD is good; his mercy is everlasting; and his truth endureth to all generations.
Many praise Him just with their lips, but yet deny the power thereof.
2Tim 3:1 This know also, that in the last days perilous times shall come.
2Tim 3:2 For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy,
2Tim 3:3 Without natural affection, trucebreakers, false accusers, incontinent, fierce, despisers of those that are good,
2Tim 3:4 Traitors, heady, highminded, lovers of pleasures more than lovers of God;
2Tim 3:5 Having a form of godliness, but denying the power thereof: from such turn away.
Isaiah 29:13 Wherefore the Lord said, Forasmuch as this people draw near me with their mouth, and with their lips do honour me, but have removed their heart far from me, and their fear toward me is taught by the precept of men:
Mat 15:8 This people draweth nigh unto me with their mouth, and honoureth me with their lips; but their heart is far from me.
Mat 15:9 But in vain they do worship me, teaching for doctrines the commandments of men.