It's said that an Army marches on its stomach: the soldiers have to be fed in order to keep going. At the same time, they also have to train continually to reach (and then remain), at peak effectiveness.
The analogy of an army on the march is a good picture of the Christian church. To be really effective, the common elements of being fed, trained and application to the task must be observed. It is a step by step process to live by the Spirit.