"The Saddharma-pundarika-sutra explains the purpose of the various Buddhas having appeared in this world. It may be said to be the great king and the great master of all the various sutras that the Buddha Shakyamuni taught. Compared with this sutra, all the other sutras are merely its servants, its relatives, for it alone expounds the Truth. The other sutras, on the other hand, include provisional teachings of the Buddha, and therefore do not express his real intention.
It is a mistake to use the teachings of the other sutras as the basis for determining the validity of those contained in the Saddharma-pundarika-sutra, for without the merit-power of the latter, the former would be valueless. All the other sutras find their origin in this sutra. As the previously quoted sentence from this sutra shows, the merit of the Three Treasures is truly of unsurpassed value." -- Grand Master Dogen