Even though we can't prepare for everything, we can have a plan in place and be aware of certain principles to make us prepared for an intruder invading our home. It's how we can keep ourselves and our family safe. The same with the Christian life... except we are preparing for the coming of the King! A mixture of spontaneity and planning is required in living the Christian life. We have to have the openness that comes to listening to the Holy Spirit but also follow Jesus on the right path with what He's already entrusted to us as tools to grow in holiness.