I think you miss the point: if 10% was good enough for Abraham, 20% seems above and beyond the call of duty.
You miss the point. Abraham tithed 10% one time from the spoils of war. Period. There is not another reference anywhere in the Old Testament to Abraham ever giving anything else to the temple, high priest, or even to God monthly, yearly, or as a % of his income. Abraham pre-dated the Mosaic law and Mosaic tithe. Abraham was still known as Abram when he gave this one-time gift and was not even in covenant with God at that point (that came later with the name change).
The fact that Christian pastors/organizations have pulled this one time event that occurred prior to the Old Covenant out of the bible to apply to the New Covenant Church is disturbing. Read it for yourself with an open mind and see where the application is for the church today.
Old Covenant giving is not even applicable to Christians as it is preached today. Those with herds and farms gave a tithe of food to the storehouse to provide for the Levites (who were not granted land and administered the temple) and the festival of the temple. Even then they did not give regularly. Read it yourself.
Beware of any church that tells you to tithe - especially those who falsely preach that you will be blessed 10-fold. We have already been blessed by the gift of Christ beyond measure - that is our salvation - not how much we claim or don’t claim on our tax returns.
If we are going to use Abraham as an example we should be sacrificing animals to God. There are numerous references to that beyond his one time tithe of the spoils of war. The 10% tithe is a false doctrine promoted by pastors and churches. The next argument is usually.... well you might be right, but 10% is a good and reasonable number because x, y, and z. While I wholeheartedly believe that it reflects the heart of Christ for me to give of my worldly income to help others and spread the gospel, I wholeheartedly disagree with anyone putting a number on it that is used to make Christians give out of guilt. Jesus removed our guilt and removed us from the Old Testament law.
What right does any person who follows Christ have to put his sister or brother back under the law? They might as well proclaim that Christ got it wrong.
It’s not perfect, but I think this man got it right and backs it up with scripture -
http://www.truthforfree.com/the-truth-about-tithing/