Giving is a way of life for the believers.  
(Deut. 8:18 KJV).
But thou shalt remember the LORD thy God: for it is He that giveth thee power to get wealth, that He may establish His covenant which He sware unto thy fathers, as it is this day.

I liken giving to breathing;
if you don't exhale, you can't inhale. If you don't sow seed, then there is no harvest because everything that is living on earth requires support.  Therefore, stewardship is essential to the furtherance  of the gospel and enables the local church to fulfill the vision of the ministries and outreaches.