tithing is a conpulsery payment and not a giving by every citizen of the God kingdom heaven. so that is why it is very unreasonable to an odinary man. remenber a real christian dont fuction with the life of a man but that of a God in other words he is a god and a fellows citizen of heaven. therefore he/she must pay his/her tithe.its the tax paid in heaven by the heavenlis.not by mere human understanding. remenber the book of milachi3...hs ni tol