Tithing and offering money and donating to the Church is supposed to earn favour from God. This is a sure means to a “prosperously blessed” life.

Tithing is Old covenant; Offering oneself completely (including all money) is New testament principle and this must be done cheerfully – not with a grudge or duty-bound. And God does everything to a believer because of grace, not as a return of investment. You won’t fall sick or face a loss because you don’t give to God. You fall sick probably because you are not a good steward of God’s money and are spending it on sinful stuff and gluttonous living.

God does not want one’s money that is borrowed (from office or the bank for various material purposes).