起信論疏筆削記 19.59

19.59

Regarding "If free from, etc.": Therefore, in the preceding discussion of the conditions of good friends, a good friend who instructs must know the deviating from the correct; because an error by a hair's breadth leads to a loss of a thousand leagues, how could one fail to repay the kindness of a good friend? Therefore in the *Dharmapada* there is repeated praise. However, practicing dhyāna concentration is not easy for a person; if one wishes to be fully versed in its doors, one must read widely across the teachings. Only the three kinds of calming and contemplation of Tiantai explain the marks of cultivation and realization of the various dhyānas, which are detailed in those texts. Now, relying briefly on beginners learning dhyāna contemplation, the manifestations of the deviating and the correct are explained: