Metta meditation originates in early Buddhist teachings and is one of the four Brahmaviharas, or sublime states of mind taught by the Buddha.
How to Practice
Settle into stillness and close your eyes
Take a few deep breaths. Let your body relax. Bring your attention inward to the area around your heart.
Offer kindness to yourself
Silently repeat: May I be happy. May I be healthy. May I be safe. May I live with ease. Mean it as best you can.
Extend kindness to someone you love
Picture someone dear to you. Repeat the same phrases for them: May you be happy. May you be healthy. Feel the warmth grow.
Widen the circle outward
Gradually include a neutral person, then someone difficult, then all beings. Let the warmth expand without forcing it.