Every day should be devoted to growing. Becoming stronger and better. The spiritual Christian will grow, and grow, and grow.
How will they grow? Not necessarily in an obvious outward manner, visible for all to see. But definitely in an inward manner, visible for God to see.
When you take a look at the fruit of the Spirit, they are more about the inward attitude and character of a person than they are about what a person does. Isn't it true that two different people can perform the exact same action, but only one of them is loving when they do it? The other being spiteful or throwing their good deed in your face...
Even further, the spiritual person will love far beyond what a natural person could ever hope to reach. Take a look at those who have ever helped you out consistently, at great cost to themselves, and see a spiritual Christian. This sort of person impresses even the hard to impress skeptic, and very often they don't even realise just how much they have given. That is a level of growth which requires the Spirit to achieve!