The individual who strives after good or to do what is right—whether conscious of it or not—is striving after the positive results that will come from living that way. In the same way, a person who decides to live contrary to God's way will automatically produce negative results.
This is the principle Paul mentions in Galatians 6:7: "Do not be deceived, God is not mocked [outwitted]; for whatever a man sows, that he will also reap." When we truly remain spiritually unleavened, we reap the rewards of godly living, such as peace, contentment, mercy, and ultimately eternal life. But the person who lets down and leads a life of sin will reap adversity, misery, destruction, and ultimately death.
John O. Reid (1930-2016)
By paying to God what we owe Him (that is, His tithes), He rewards us with blessings. Christians often find their third tithe years to be abundant with all types of blessings and invaluable lessons learned. These are not always material blessings, however. Storing up spiritual treasures in heaven is far more important than physical prosperity. God does not promise to make us wealthy but that our relationship with Him will prosper. Such eternal blessings are far greater than any temporary physical blessings we could receive.
Martin G. Collins
Tithing: Third Tithe