There are no limits on true self-giving. It is not just to those one likes that one makes the offering. This involves a love that issues from the very CENTER of the person's being, directed to the CENTER of the other person's being, a love that gives ALL that the person is in order to foster the other person's life, a love that is offered to EVERYONE, without exception and without condition. The love is not offered to people because they are one's friends; people become "friends" because one loves them.
Migratory birds fly very high, for three reasons. First, at a high altitude they can see better where they are going. Secondly, they are above the predatory birds that may prey on them. Thirdly, in that rarefied atmosphere they can fly very swiftly and easily. That is a parable of the way of prayer. Our souls are migratory souls. Our home is not here, but with God, to whom we seek to rise on the wings of prayer. We want to get high to see where we are going ... to rise above the noises, the fuss, and all the complications that distract and rob our lives of their own spiritual quality ... to pass swiftly to our true home, the communion of our souls with God.