We intend whatever we love, and whatever we love or intend we think about and justify by various means. Whatever we love or intend we call good, and whatever thoughts and various justifications we have we call true. That is why truth turns into goodness when it becomes a matter of our love and will, or when we love and will it. And since our love or our will is the core of our existence, no truth comes to life for us as long as we only know about it and think about it—[it comes to life] only when we love and will to do it and we do it as a result of our love and our will. That is how truths receive their life—from what is good. So truths get their life from what is good, and truths have no life apart from what is good.
When truth is joined to what is good it becomes part of us because it becomes a matter of our life. In order for a truth to be joined to some goodness, our will needs to agree with our understanding; not until our will agrees does the joining take place.
As we are being regenerated, truths become a part of us, along with a feeling of pleasure because we love to do them; and later those truths come back to us with that same feeling again, because the truths and the feeling are joined together. Some feeling related to what we love always attaches itself to any truths we learn, depending on the use we make of those truths in our lives. If those truths come to mind, the feelings come with them: or if those feelings recur, then the truths come with them. Goodness does not recognize anything as true unless it is in harmony with the inclinations of its love. Truths gain entrance to us by means of things that are pleasurable and delightful [to our earthly self]. All genuine love of truth comes from and is shaped by goodness. There is a subtle entry and inflow of goodness into truths, and there is a joining together of goodness and truth and that is how truths come to life.
Because some feeling of love always attaches itself to any truths we learn, depending on the use we make of those truths in our lives, a given type of goodness recognizes the truth that is its own, and a given type of truth recognizes the goodness that is its own. The result is a joining together of what is true and what is good. Truths recognize each other as well and gather together. This happens because of an inflow from heaven.
from New Jerusalem, Section 23