1.伊川先生答朱长文书曰:心通乎道,然后能辨是非,如持权衡[1]以较轻重,孟子所谓“知言”是也。心不通乎道,而较古人之是非,犹不持权衡而酌轻重,竭其目力,劳其心智,虽使时中,亦古人所谓“亿则屡中[...