No one knows what faith is in its essence who does not know what goodwill is, because where there is no goodwill there is no faith. This is because goodwill is just as inseparable from faith as goodness is from truth. That is, what we love or really care about is what we regard as good, and what believe in is what we regard as true. We can therefore see that the oneness of goodwill and faith is like the oneness of what is good and what is true.
The oneness of goodwill and faith is also like the oneness of our will and understanding. These are, after all, the two capacities that take in what is good and what is true, our will taking in what is good and our understanding what is true. So, too, these two capacities take in goodwill and faith, because goodness is a matter of goodwill and truth is a matter of faith. No one is ignorant of the fact that goodwill and faith are associated with us and are in us, and since they are associated with us and in us the only place they can exist within us is in our will and our understanding. Our whole life resides there and comes forth from there. We do have memory as well, but that is only a waiting room where things gather that are going to enter our understanding and will. We can see, then, that the oneness of goodwill and faith is like the oneness of will and understanding.
Goodwill unites with faith for us when we will to do what we know and sense. Willing is a matter of goodwill, and knowing and sensing are matters of faith. Faith moves into us and becomes part of us when we both will to do and love what we know and sense. Until that happens, it is outside us.
Faith is not faith for us until it becomes spiritual, and it does not become spiritual unless it becomes a matter of love. It becomes a matter of love when we love to live out what is true and good–that is, to live by what we are commanded in the Word.
from Regeneration, Pages 16,17