瑜伽師地論略纂 7.34

7.34

'The first is uncommon': first, the training in morality can be practiced alone as one, because it can be achieved without relying on concentration and wisdom. 'The middle is not separated from the first': second, the training in concentration is not separated from the training in morality in cultivating expedients to achieve it. 'The superior is not separated from the two': third, the training in wisdom must necessarily be endowed with the first two as a training. When an arhat has perfected the three trainings, he transcends all of them.