“It took Gautama four weeks of meditation to obtain enlightenment. He reached final enlightenment in four stages. 4. In the first stage he called forth reason and investigation. His seclusion helped him to attain it easily. 5. In the second stage he added concentration. 6. In the third stage he brought to his aid equanimity and mindfulness. 7. In the fourth and final stage he added purity to equanimity and equanimity to mindfulness.”

“It took Gautama four weeks of meditation to obtain enlightenment. He reached final enlightenment in four stages. 4. In the first stage he called forth reason and investigation. His seclusion helped him to attain it easily. 5. In the second stage he added concentration. 6. In the third stage he brought to his aid equanimity and mindfulness. 7. In the fourth and final stage he added purity to equanimity and equanimity to mindfulness.”

— B.R. Ambedkar