I think it is sad to see how many pastors focus on trying to get people to "tithe" to their church. In my humble opinion, ministers spend way too much time talking about something that Jesus basically never talked about. Jesus only mentions the tithe one time and that is when He is rebuking some religious leaders for "tithing." That's right, Jesus wasn't impressed with their tithe.
“Woe to you, teachers of the law and Pharisees, you hypocrites! You give a tenth of your spices—mint, dill and cummin. But you have neglected the more important matters of the law—justice, mercy and faithfulness. You should have practiced the latter, without neglecting the former." Matthew 23:23
Apparently these individuals were giving as a religious act or duty, but their hearts were not engaged. Giving should be something that is an act of worship. It is the response of someone who understands that all he or she has is a gift given to them by God.
"You may say to yourself, “My power and the strength of my hands have produced this wealth for me.” But remember the Lord your God, for it is he who gives you the ability to produce wealth, and so confirms his covenant, which he swore to your forefathers, as it is today." - Deuteronomy 8:17-18