Shinran Shonin 親鸞 (1173 – 1263): A deep mind
Singlemindedness is deep mind. Deep mind is deep faith. Deep faith is steadfast deep faith. Steadfast deep faith is decisive mind. Decisive mind is supreme mind. Supreme mind is true faith. True faith is enduring mind. Enduring mind is sincere mind. Sincere mind is mindfulness. Mindfulness is the true One Mind. The true One Mind is great joy. Great joy is the true entrusting heart. The true entrusting heart is adamantine faith. Adamantine faith is the aspiration for Buddhahood. The aspiration for Buddhahood is the desire to save sentient beings. The desire to save sentient beings is the desire to embrace sentient beings and bring them to the Pure Land of Peace and Bliss. This desire is the great bodhi-mind. This mind is the great compassion, for it arises from the wisdom of infinite light. The oceanlike vow is without discrimination; hence, aspiration for bodhi is without discrimination. Since aspiration for bodhi is without discrimination, the wisdom of the path is also without discrimination. Since the wisdom of the path is without discrimination, great compassion is without discrimination. Great compassion is the right cause of Buddha’s enlightenment.
(From the Kyogyoshinsho, by Shinran Shonin)