I wonder why we feel like we need to use this word in Christianity when the apostles never once used it the context of Christian giving. The truth is this is not applicable to the church age.
However, most of us should be giving far more than 10% of our income. Jesus has offered us the opportunity to lay up treasure in heaven. If we were wise we would heed His Words and give us much as we possibly could. This is a retirement investment that will last forever!
In 2nd Corinthians, Paul called the desire to give the "grace of God" in our lives. I pray that God will increase this grace my life. I do not deserve to be able to give to His work and get rewarded in eternity for it. Jesus became poor so that we could become rich. If we sow bountifully, we will reap bountifully. Giving causes praise to go up to God! Paul described the results of giving as an indescribable gift!
We should always also keep in mind that our giving must be as anonymous as possible. We need to be careful to make sure our reward comes in eternity and not in this life.
Pastors and teachers, please start teaching these things accurately. Paul, Peter, and John did not feel the need to use the word tithe in their exhortations to Christians. The concept of Christian giving is so abused today. I know that God will bless you if you teach these things correctly.
Those young in the faith do not need to hear a sermon on tithing one out of every five sermons when they come to your church. I believe your church will grow even more and people will give even more if you follow the example of the apostles. It would be better if the word tithe was never used at all in you exhortations to your church. The apostles did not do it, so why do we?
The question is, do we trust God enough not to try to plant specific percentages in people's minds?
I liked what J. Vernon McGee said in his commentary on 2Cor 8:12:
Here is something very important to note. Each should give according to "that a man hath," and he is to do it with a willing mind. No one is to give according to what he does not have.
In the section on 1 Corinthians, I gave an illustration which I will repeat because it is a very fine example of this principle.
When I was pastoring a church in Texas, one of my officers owned several Coca-Cola plants, and one of them was in our town. He was a man of means, and he owned a ranch where we used to go out to hunt and fish. Often he would ask me why I didn't preach on tithing. One day I said, "Why should I preach on tithing?" He said, "Because it is the Bible way of giving." I agreed, "Yes, it was the Old Testament way of giving, but under grace I don't believe tithing is the way it should be done." So he asked me, "How do you think it ought to be done?" I took him to this verse: "As God has prospered him." Now this was during the Depression. If you are as old as I am, you will remember that the Depression in the 1930s was a very serious time. So I said to him, "For some strange reason, Coca-Cola is selling, and you are doing very well. However, there are some members in our church who couldn't give a tithe right now. I don't believe God is asking them to give a tenth. There are a few people who are doing well, and they are to give as they have been prospered—and they are not to stop with a tenth. Probably they ought to give a half." Do you know that this man never again suggested that I preach on tithing! The reason was that he found out that a man is to give according to what he hath, not according to what he hath not.
The tithes were a basic measurement in the Old Testament, and I cannot believe that any Christian today who has a good income should give less than one tenth. In this time of great abundance Christians should be giving more than a tenth.