涅槃經遊意 1.210

1.210

開善為恒，河西云常，「常」、「恒」者名異義一。不從緣生為「常」，始終真實為「恒」；開「樂」為「安」，內無惱為「樂」，外不危曰「安」也；不老、不死是「我」（我故不老，我故不死也）；清涼、無垢並是「淨」義也。

Kaishan uses 'enduring', whereas Hexi says 'permanent'; 'permanent' and 'enduring' are different names for a single meaning. Not arising from conditions is 'permanent'; being true from beginning to end is 'enduring'. Expanding 'bliss' into 'secure': being internally free of distress is 'bliss', and being externally free of danger is called 'secure'. Ageless and deathless are 'self' (because of the self, one does not age; because of the self, one does not die). Refreshing and unstained both signify 'purity'.