Jesus Christ set the example for us through sacrificially giving for the good of those around Him. The Bible talks about how Jesus took on the nature of a servant, even though He is God, and served others.
As Christians, we understand that everything we have comes from Him and we desire to honor the Lord with our wealth and "first-fruits" in what He gives us (Proverbs 3:9). We give not out of duty or fear but because we know that what you honor you get more of and we honor the favor God has shown us individually and corporately.