He is faithful
"Faithful is He who calls you, and He also will bring it to pass." - 1 THESSALONIANS 5:24
If God calls you to something He’s responsible for making it happen. The hammer can build whole houses, but only in the carpenter’s hand. The hammer is the instrument, but the carpenter is the builder. God calls us to be tools by which His Kingdom advances in the world. Once we accept the call, it’s His business to supply our needs, use us where we fit best, and finish the job. We work, then, from a position of rest, because He has promised that He is faithful to get the job done through people as available as a hammer is to carpenter.