"When God speaks, many of us are like people in a fog, and we give no answer. Moses' reply to God revealed that he knew where he was and that he was ready. Readiness means having a right relationship to God and having the knowledge of where we are. We are so busy telling Go where we would like to go. Yet the man or woman who is ready for God and His work is the one who receives the prize when the summons comes. We wait with the idea that some great opportunity or something sensational will be coming our way, and when it does come we are quick to cry out, 'Here I am.' Whenever we sense that Jesus Christ is rising up to take authority over some great task, we are there, but we are not ready for some obscure duty.
Readiness for God means that we are prepared to do the smallest thing or the largest thing - it makes no difference. It means we have no choice in what we want to do, but that whatever God's plans may be, we are there and ready. Whenever any duty presents itself, we hear God's voice as our Lord heard His Father's voice, and we are ready for it with the total readiness of our love for Him." From My Utmost for His Highest, by Oswald Chambers