“Maintaining loyalty is definitely not an easy matter. But if we are able to do it, then it is the pinnacle of our appreciation of the true meaning of love.”
Related quotes

Variant: Love is our true destiny. We do not find the meaning of life by ourselves alone we find it with another.
Source: Love and Living

“Foreign powers do not seem to appreciate the true character of our Government.”
Inaugural Address (4 March 1845).
Variant: Sol remembered the dream, remembered his daughter’s hug, and realized that in the end—when all else is dust—loyalty to those we love is all we can carry with us to the grave.
Source: The Fall of Hyperion (1990), Chapter 30 (p. 242)

1950s, Loving Your Enemies (Christmas 1957)
Context: Forgiveness does not mean ignoring what has been done or putting a false label on an evil act. It means, rather, that the evil act no longer remains as a barrier to the relationship. Forgiveness is a catalyst creating the atmosphere necessary for a fresh start and a new beginning. It is the lifting of a burden or the canceling of a debt. The words "I will forgive you, but never forget what you have done" never explain the real nature of forgiveness. Certainly one can never forget, if that means erasing totally for his mind. But when we forgive, we forget in the sense that the evil deed is no longer a mental block impeding a new relationship. Likewise, we can never say, "I will forgive you, but I won't have anything further to do with you." Forgiveness means reconciliation, a coming together again. Without this, no man can ever love his enemies. The degree to which we are able to forgive determines the degree to which we are able to love our enemies.

Introduction to Treasury of the Free World (1946)