From God's Word I believe we clearly see that Tithing (firstborn/first fruits) is a principle of LIFE- not a constraint of the LAW.Tithing is NOT law, but rather it's an unchanging principle established by an unchanging GOD! Yes today we are under Grace, but that doesn't abolish the law. Under Grace we are still to uphold the priciples we read of under the old covenant (OT). Those principles don't change- because God doesn't change.....but living in obedience to those principles will change YOU!