Si (
Chinese: 思;
pinyin: sī) is a concept in
Chinese philosophy that is usually translated as 'reflection' or 'concentration'. It refers to a species of attentive, non-
rational thought that is directed at a specific subject.[1]
References
^Ivanhoe, P.J., & Van Norden, B.W. (eds.) (2001). Readings in Classical Chinese Philosophy, 2nd Ed. Hackett Publishing Co.: Indianapolis, p. 392