To give anything less than your best is to sacrifice the gift!
"Do not merely listen to the word, and so deceive yourselves. Do what it says." James 1:22
"For the Kingdom of God is not a matter of talk but of power" 1 Corinthians 4:20
"Whatever you do, work at it with all your heart, as working for The Lord, not for human masters since you know that you will receive an inheritance from The Lord as a reward. It is The Lord Christ you are serving" Colossians 3:23-24