"But who am I, and who are my people, That we should be able to offer so willingly as this? For all things come from You, And of Your own we have given You."  

1 Chronicles 29:14

David gave all he had to the Lord, but David also had a realization he was only giving back what the Lord had given him.  When we give a tithe (tenth) or any kind of offering, we are only returning back to God what is His.  The Bible is clear; the abundance of the Earth belongs to the Lord.  Everything we possess is His.  We are only stewards, entrusted with the Lord's belongings.  From our money, to the very breath in our lungs, it all belongs to the Lord.  Let us be good stewards of all God has entrusted us with.  Our finances, our families, our lives, let us use everything in a way that brings glory to God.  Let us be generous and joyful in our giving, knowing God gives to us liberally and joyfully!   Remember, "Give, and it will be given to you; good measure, crushed down, full and running over, they will give to you. For in the same measure as you give, it will be given to you again."

"But this I say: He who sows sparingly will also reap sparingly, and he who sows bountifully will also reap bountifully. So let each one give as he purposes in his heart, not grudgingly or of necessity; for God loves a cheerful giver." 2 Corinthians 9:6-7