There is really no natural limit to the practice of loving kindness in meditation or in one’s life. It is an ongoing, ever-expanding realization of interconnectedness. It is also its embodiment. When you can love one tree or one flower or one dog or one place, or one person or yourself for one moment, you can find all people, all places, all suffering, all harmony in that one moment. Practicing in this way is not trying to change anything or get anywhere, although it might look like it on the surface. What it is really doing is uncovering what is always present. Love and kindness are here all the time, somewhere, in fact, everywhere. Usually our ability to touch them and be touched by them lies buried below our own fears and hurts, below our greed and our hatreds, below our desperate clinging to the illusion that we are truly separate and alone.
― Jon Kabat-Zinn, Wherever You Go, There You Are: Mindfulness Meditation in Everyday Life