Life in Christ is like traveling on a metro link train, with a predetermined destination. You are not the driver, Jesus is, and God provided the route on this one time trip. He plotted everything, the date and the time of your travel and arrival. There will be stops and delays along the way, but remember this, at the bottom of a traffic light is always a green light.
Joy is not a requirement of Christian discipleship, it is a consequence. It is not what we have to acquire in order to experience life in Christ; it is what comes to us when we are walking in the way of faith and obedience.