維摩經玄疏 6.12

6.12

答曰：如君強，不須輔相；君弱，則輔相共治國。聲聞經法相理弱，故須三印治，破愛，觀無常；破見，觀無我。若入苦忍真明，俱得寂滅也。

Answer: It is like when a ruler is strong, he does not need ministers of state; when a ruler is weak, ministers of state govern the country together with him. In śrāvaka sūtras, the principle of dharmas is weak, so the regulation of the three seals is needed: to destroy craving, one contemplates impermanence; to destroy views, one contemplates non-self. If one enters the true illumination of forbearance toward suffering, both attain tranquil extinguishing.