Endlessness of effect is natural. Here it is revealed that both the nine realms as cause and the realm of Buddha as effect are beginningless and endless in the past, present, and future. To conclude, cause and effect originally existed simultaneously; they exist in the present time, and they will exist in the future. At this point, there is no time difference between the nine realms as cause and the realm of Buddha as effect, and they exist simultaneously. This is true cause and true effect which is the relationship of cause and effect based on the enlightenment of the Original Buddha.

Now, the true meaning of the mutual possession of ten realms and three thousand existences in one thought is established. If effect comes out only after the work of cause is completed, there would be some time distance between cause and effect; mutual possession could not be established.