Jhn 3:16 For God so loved the world, that he
gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Mat 6:21 For where your treasure is, there will your heart be also.
Mat 6:24 No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.
While the Tithe is not a new testament requirement (we are no longer under the law), certainly giving from the heart is faith in action. God is not after dollars, but after your heart. Giving is love. For God so loved, that He gave. A new testament on tithing is that it is a spiritual act of worship, and also spiritually represents our submission to Chirst as master and king. The Bible points to humanity's purpose as stewards of this world. What is money but a natural representation of this world. By giving we properly orient our priorities -- after all -- all things are His, and we are his officers.
Moreover, we can see that giving to our churches advances His kingdom.
he law prohibited giving money as the tithe.
Deu 14:22 Thou shalt truly tithe all the increase of thy seed, that the field bringeth forth year by year.
Deu 14:23 And thou shalt eat before the LORD thy God, in the place which he shall choose to place his name there, the tithe of thy corn, of thy wine, and of thine oil, and the firstlings of thy herds and of thy flocks; that thou mayest learn to fear the LORD thy God always.
Deu 14:24 And if the way be too long for thee, so that thou art not able to carry it; [or] if the place be too far from thee, which the LORD thy God shall choose to set his name there, when the LORD thy God hath blessed thee:
Deu 14:25 Then shalt thou turn [it] into money, and bind up the money in thine hand, and shalt go unto the place which the LORD thy God shall choose:
Deu 14:26 And thou shalt bestow that money for whatsoever thy soul lusteth after, for oxen, or for sheep, or for wine, or for strong drink, or for whatsoever thy soul desireth: and thou shalt eat there before the LORD thy God, and thou shalt rejoice, thou, and thine household,
If you are going by this, I would remind you:
Gal 3:10 For as many as are of the works of the law are under the curse: for it is written, Cursed [is] every one that continueth not in all things which are written in the book of the law to do them.
The moment you feel you have to obey the law, you have heaped an impossible burden upon yourself. For if you feel you must be justified by the law, then you must follow every minute detail of the whole law for that justification to work. Clearly, that is impossible. In fact, the purpose of the law was to show that all have fallen short and are sinners -- the purpose of the law is to show that N

NE can do the law.
Rom 5:12 Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:
Rom 5:13 (For until the law sin was in the world: but sin is not imputed when there is no law.
om 5:20 Moreover the law entered, that the offence might abound. But where sin abounded, grace did much more abound:
Gal 3:11 But that no man is justified by the law in the sight of God, [it is] evident: for, The just shall live by faith.
Gal 3:12 And the law is not of faith: but, The man that doeth them shall live in them.
Gal 3:19 Wherefore then [serveth] the law? It was added because of transgressions, till the seed should come to whom the promise was made; [and it was] ordained by angels in the hand of a mediator.
That being said -- just because we are not obligated to do the law doesn't mean we can't be blessed by operating under God's economy:
Mal 3:10 Bring ye all the tithes into the storehouse, that there may be meat in mine house, and prove me now herewith, saith the LORD of hosts, if I will not open you the windows of heaven, and pour you out a blessing, that [there shall] not [be room] enough [to receive it].
There are very few places where God says "do this and prove me and see if what I say is true".