Deuteronomy 23-26

In chapter 26 Moses teaches the people a testamony that they are to confess before the LORD every time they bring up the tithe. In verses 5 through 15 the one making the offering is called to acknowledge two facts:
What God has done in the past to bring about this harvest. Explaining how God has kept his part of the covenant.
What the individual has done in response to God's provisions. How he has acted to keep his part of the covenant.
I suppose it would not be a bad idea for Christians to make the same declarations when offering our gifts, and lives, to God. As a way to keep us in line with all of God's plans. 
It took me about 14 minutes to read this passage.
Stuart