Upon reading the teachings of Our Lady, I found many references to the first rule. Even in the adapted Madrian rules for a harmonious life, the first, universal rule comes up as the heart of all the other rules. This universal law is stated directly in The Clear Recital:CDV on page 105 in the second paragraph of The Way of Simplicity. Verse 5, line 4 we find the first rule of Our Lady stated explicitly: law of Universal Love. This is further clarified on page 109, Verse 38 of The Way of Simplicity:
Love every soul as you love your own self, and give forth freely of all good things of body and of soul.
We are called by Our Lady, all of us, from the least blade of grass to the highest of the janyati/angels to engage the world with love. This love stretches through out the whole of creation to the spheres of heaven and beyond. There is no exception to this rule.
What of the emotion hate, one might ask. Hate is not the opposite of love but rather an inversion of it, often due to a love betrayed. The opposite of love is indifference. They who are indifferent have no consideration good or ill towards the subject.
Indifference can fly the flag of hatred and through doing so commit a great many evils. Indifference is opportunistic and can fly the flag of love if it serves its goals. There is no true love there but a skilled masquerade that is dropped as soon as the goals are met.
A perfect love is skilled in transmuting and healing the wounds of hate. A perfect love is unto all, even those who are abhorrent. It is not an easy path to walk in this complicated but it is the simplest and most courageous.