There are lights which ascend and lights which descend. The ascending lights are the lights of the heart; the descending lights are those of the Throne. The false self is the veil between the Throne and the heart, like springs toward like. Light ascends toward light and light descends upon light, and "it is light upon light."
If you maintain a feeling of compassion, loving kindness, then something automatically opens your inner door. Through that, you can communicate more easily with other people. And that feeling of warmth creates a kind of openness. You'll find that all human beings are just like you, so you'll be able to relate to them more easily. That gives you a spirit of friendship.