When God calls you to something, He's rarely going to give you all the details. If God gave us every detail, it wouldn't require faith, and without faith, it's impossible to please Him. Sometimes, if we knew exactly what obedience would cost or where it would lead, we might never take the first step. God gives us the opportunity to choose obedience over certainty. We don't have to know God's plan to trust that He has a purpose. It's not our job to know the outcome. It's our job to be faithful to His promptings.