If you’re interested in metta, or lovingkindness meditation, Sharon Salzberg has done a lot to make that approach accessible to people. The following link includes an article by her with a description of metta meditation and the use of phrases to express our intention to be kind and benevolent: Why Loving-Kindness Takes Time: Sharon Salzberg
Another excellent source on metta practice is from Lion’s Roar, and includes written and recorded material from a diverse set of authors, including guided meditations, book recommendations, etc.. You can find that material at this link: Metta Meditation: A Complete Guide to Loving-Kindness
Sharon Salzberg’s book Lovingkindness: The Revolutionary Art of Happiness , published by Shambhala, is a great introduction to the practice and concepts associated with metta. Her book also describes the other qualities (the Brahmaviharas) that we’ll talk about in the next month or two, which include equanimity, compassion, and appreciative joy. Another excellent book on these four qualities is Christina Feldman’s book, Boundless Heart: The Buddha’s Path of Kindness, Compassion, Joy, and Equanimity, also published by Shambhala.