觀音義疏 2.15

2.15

若有禮拜，福不唐捐，此結成身業之機，亦是釋疑之義。結義可解。釋疑者，若言禮拜願滿，自有禮拜不蒙願滿者，何得云不唐捐？唐者言徒，捐者言棄，由心不志即願未滿，禮拜之功冥資不失，此得是釋疑也。

"If there is prostration, the fortune is not in vain": this concludes the latent capacity of bodily karma, and is also meant to resolve doubts. The meaning of concluding can be understood. As for resolving doubts: if it is said that prostration fulfills vows, there are those who perform prostrations yet do not receive fulfillment of their vows; how can it be said to be "not in vain"? "Tang" means in vain; "juan" means discarded. When, because the mind is not earnest, the vow is not fulfilled, the power of prostration still assists unseen without being lost. This can be [understood as] resolving doubts.