大乘起信論廣釋卷第三．四．五 3.63

3.63

論。此義云何　釋曰。次下釋疑。於中有三。初問。次答。後結。此初也。現有塵境異心可見能取所取了然差別。三界六塵固在心外。此唯心者義云何耶。

[Treatise:] What does this mean?
[Commentary:] Next below, doubts are resolved. In this there are three parts: first, a question; next, an answer; finally, a conclusion. This is the first. Existing sense-field objects can be seen as different from the mind, with the grasping and the grasped distinctly differentiated. The three realms and six sense fields are surely external to the mind. How is it that they are "only mind"?