Honour the Lord with thy substance, and with the firstfruits of all thine increase: So shall thy barns be filled with plenty, and thy presses shall burst out with new wine. Proverbs 3:9-10
A man says, “show me and I will believe” while God says, “believe and I will show you”. There is no better demonstration of this than in our tithes to God. We are told when we generously give out of love and gratitude, our gifts to God will be returned to us many times over. There is a wise saying, “You cannot out give God!” and I can attest that is true. The purpose of giving is to glorify God in the thanksgivings of those who received your gift. If you require financial blessing before you give, then you will consistently be disappointed, and so will God. God does not need your money; a generous tithe is truly a test of faith.
Your gift to him is to your credit so trust, give, relax, and see what happens. Whatever you give, it should be meaningful to you or I doubt it will be meaningful to God. If your gift causes you to flinch just a bit, then I think you are doing well!
But this I say, He which soweth sparingly shall reap also sparingly; and he which soweth bountifully shall reap also bountifully. Every man according as he purposeth in his heart, so let him give; not grudgingly, or of necessity: for God loveth a cheerful giver. 2 Corinthians 9:6