Psalm 24:1 says that “The earth is the LORD’s, and all its fullness.” This truth lays the foundation of why Christians tithe. It is giving back to God a portion of what was already His to begin with. But it doesn’t stop there. Tithing requires humility because it expresses dependency on the sovereignty and faithfulness of God. By setting aside the firstfruits of their finances, Christians are saying, “I give this to you as an act of faith because I know that my provision comes from you alone.”