Cup
What is the purpose of a cup?
There are almost unlimited materials that a cup can be made from, any shape, or size--but they all have the same purpose.
If it sits unused in a cabinet it is a waste of material. If it is only filled and not poured it grows moldy and nasty. If it is filled and poured out it has fulfilled it's use. Yet it will need to be washed from time to time, but the purpose of a cup is to be filled up and poured out. The more liquid it moves the better. We are to be cups to carry and pour Christ's love.
Why remain comfortable in your cabinet? Why rejoice in being filled up but sit there refusing to pour. What was the purpose in filling you then? Isn't a cup of water desired most by those who are thirsty? And you would deny them that? It's worse for you to be filled and not poured than to not be filled at all, at least you are still clean then... Useless... But clean. Why agonize over being poured out? Is this not what your purpose is? Glorify God in being poured out as well, for you are fulfilling your purpose as a vessel of God's love.
"Whoever brings blessing will be enriched, and one who waters will himself be watered." Proverbs 11:25