Th T r D s th ntrl wy f th nvrs, prmrly s cncvd n st sn phlsphy nd rlgn. Ths sng f lf cnnt b grspd s cncpt. Rthr, t s sn thrgh ctl lvng xprnc f n's vrydy bng. Th cncpt s rprsntd by th Chns chrctr 道, whch hs mnngs ncldng 'wy', 'pth', 'rd', nd smtms 'dctrn' r 'prncpl'.
n th T T Chng, th ncnt phlsphr Lz xplns tht th T s nt nm fr thng, bt th ndrlyng ntrl rdr f th nvrs whs ltmt ssnc s dffclt t crcmscrb bcs t s nn-cncptl yt vdnt n n's bng f lvnss. Th T s "trnlly nmlss" nd shld b dstngshd frm th cntlss nmd thngs tht r cnsdrd t b ts mnfsttns, th rlty f lf bfr ts dscrptns f t.