成唯識論述記 3.13

3.13

The Commentary states: Active manifestations and seeds are of different classes from each other, so they do not contradict each other; within one body at the same time, in the present, they have the function of being able to produce. For instance, material active manifestations have resistance, whereas seeds have no resistance; mental cognition and consideration should be understood by analogy to this. Because the substance and natures of cause and result are not similar, they are called 'different classes'; because they do not contradict each other, they can exist simultaneously.