I once had a set of knives that I really loved. They were sharp, felt good to handle and very strong too, I cherished them so much and was always excited to chop away; that was until they went blunt, no matter how much I tried to sharpen them, they remained blunt. I was no longer excited when I needed to chop, slice or cut in my kitchen; the knives were no longer fit for my use. After a while I replaced them with better knives and my kitchen experience regained its excitement.
God is a master maker and we are likened to tools in His hand. Just like our tools, like my set of knives, we must be fit for His use or He will not be able to accomplish anything through us. If you are like me who wants to be used to maximum by God then you would want to do all that is required in order to be fit for His use. And like we all know, any one He uses receives a deposit of His blessing.
So whoever cleanses himself [from what is ignoble and unclean, who separates himself from contact with contaminating and corrupting influences] will [then himself] be a vessel set apart and useful for honorable and noble purposes, consecrated and profitable to the Master, fit and ready for any good work. 2 Timothy 2: 21