We like giving excuses. We like explaining why God's Call is impossible to follow. But our excuse to escape God's call is His excuse to manifest His power. Your limitation (you are too poor, you don't have time, you are too busy, you are not educated enough...) is God's stage to proclaim to the world that miracle still happen. Friend, when you say Yes to God, you're saying Yes to the Unknown. He will lead you to lands you can't even imagine. You don't know what exactly will happen. That's why Yes requires Trust. Submission is trust. Yes means trusting God that the best is yet to come.