《周易》中的陰爻為何用六、陽爻用九表示?
一(yi)、余(yu)三十(shi)(shi)六(liu)(liu)(liu)根,九(jiu)揲(she)(she)之(zhi)數(shu)(shu),是(shi)為(wei)(wei)(wei)(wei)(wei)九(jiu),為(wei)(wei)(wei)(wei)(wei)“老(lao)陽(yang)(yang)”,為(wei)(wei)(wei)(wei)(wei)可變之(zhi)陽(yang)(yang)爻(yao)(yao)(yao)。 二(er)、余(yu)三十(shi)(shi)二(er)根,八(ba)揲(she)(she)之(zhi)數(shu)(shu),是(shi)為(wei)(wei)(wei)(wei)(wei)八(ba),為(wei)(wei)(wei)(wei)(wei)“少(shao)(shao)(shao)(shao)(shao)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)”,為(wei)(wei)(wei)(wei)(wei)不變之(zhi)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)爻(yao)(yao)(yao)。 三、余(yu)二(er)十(shi)(shi)八(ba)根,七(qi)揲(she)(she)之(zhi)數(shu)(shu),是(shi)為(wei)(wei)(wei)(wei)(wei)七(qi),為(wei)(wei)(wei)(wei)(wei)“少(shao)(shao)(shao)(shao)(shao)陽(yang)(yang)”,為(wei)(wei)(wei)(wei)(wei)不變之(zhi)陽(yang)(yang)爻(yao)(yao)(yao)。 四(si)、余(yu)二(er)十(shi)(shi)四(si)根,六(liu)(liu)(liu)揲(she)(she)之(zhi)數(shu)(shu),是(shi)為(wei)(wei)(wei)(wei)(wei)六(liu)(liu)(liu),為(wei)(wei)(wei)(wei)(wei)“老(lao)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)”,為(wei)(wei)(wei)(wei)(wei)可變之(zhi)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)爻(yao)(yao)(yao)。 至(zhi)(zhi)此得初爻(yao)(yao)(yao)。陽(yang)(yang)爻(yao)(yao)(yao)畫“—”,若為(wei)(wei)(wei)(wei)(wei)老(lao)陽(yang)(yang),則(ze)在畫旁記“九(jiu)”,如(ru)其為(wei)(wei)(wei)(wei)(wei)少(shao)(shao)(shao)(shao)(shao)陽(yang)(yang),則(ze)記“七(qi)”。陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)爻(yao)(yao)(yao)畫“- -”,若為(wei)(wei)(wei)(wei)(wei)老(lao)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin),則(ze)記“六(liu)(liu)(liu)”,若為(wei)(wei)(wei)(wei)(wei)少(shao)(shao)(shao)(shao)(shao)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin),則(ze)記“八(ba)”。九(jiu)、八(ba)、七(qi)、六(liu)(liu)(liu)謂(wei)之(zhi)“四(si)營(ying)”,二(er)、三、四(si)、五(wu)、上各爻(yao)(yao)(yao)皆依初爻(yao)(yao)(yao)之(zhi)演(yan)法而(er)(er)得出(chu)。六(liu)(liu)(liu)爻(yao)(yao)(yao)俱(ju)得而(er)(er)卦(gua)成(cheng)。每爻(yao)(yao)(yao)三變,故(gu)(gu)十(shi)(shi)八(ba)變乃成(cheng)一(yi)卦(gua)。 筮(shi)法以(yi)四(si)營(ying)象四(si)時(shi),以(yi)七(qi)象春(chun)(chun),以(yi)九(jiu)象夏(xia),以(yi)八(ba)象秋,以(yi)六(liu)(liu)(liu)象冬(dong)(dong)。春(chun)(chun) > 夏(xia) > 秋 > 冬(dong)(dong) > 春(chun)(chun),其氣溫(wen)變化規(gui)律正與七(qi) > 九(jiu) > 八(ba) > 六(liu)(liu)(liu) > 七(qi)的數(shu)(shu)字(zi)升降大致匹配。 春(chun)(chun)季為(wei)(wei)(wei)(wei)(wei)陽(yang)(yang)而(er)(er)不盛,故(gu)(gu)為(wei)(wei)(wei)(wei)(wei)“少(shao)(shao)(shao)(shao)(shao)陽(yang)(yang)”。從春(chun)(chun)至(zhi)(zhi)夏(xia),由(you)陽(yang)(yang)至(zhi)(zhi)陽(yang)(yang),故(gu)(gu)“少(shao)(shao)(shao)(shao)(shao)陽(yang)(yang)”為(wei)(wei)(wei)(wei)(wei)不變之(zhi)爻(yao)(yao)(yao)。夏(xia)季為(wei)(wei)(wei)(wei)(wei)陽(yang)(yang)而(er)(er)盛,故(gu)(gu)為(wei)(wei)(wei)(wei)(wei)“老(lao)陽(yang)(yang)”。從夏(xia)至(zhi)(zhi)秋,由(you)陽(yang)(yang)轉陰(yin)(yin)(yin)(yin)(yin)(yin)(yin),故(gu)(gu)“老(lao)陽(yang)(yang)”為(wei)(wei)(wei)(wei)(wei)可變之(zhi)爻(yao)(yao)(yao)。秋季為(wei)(wei)(wei)(wei)(wei)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)而(er)(er)不盛,故(gu)(gu)為(wei)(wei)(wei)(wei)(wei)“少(shao)(shao)(shao)(shao)(shao)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)”。從秋至(zhi)(zhi)冬(dong)(dong),由(you)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)至(zhi)(zhi)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin),故(gu)(gu)“少(shao)(shao)(shao)(shao)(shao)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)”為(wei)(wei)(wei)(wei)(wei)不變之(zhi)爻(yao)(yao)(yao)。冬(dong)(dong)季為(wei)(wei)(wei)(wei)(wei)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)而(er)(er)盛,故(gu)(gu)為(wei)(wei)(wei)(wei)(wei)“老(lao)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)”。從冬(dong)(dong)至(zhi)(zhi)春(chun)(chun),由(you)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)轉陽(yang)(yang),故(gu)(gu)“老(lao)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)”為(wei)(wei)(wei)(wei)(wei)可變之(zhi)爻(yao)(yao)(yao)。 因此,實(shi)際上九(jiu)、七(qi)都(dou)是(shi)陽(yang)(yang)爻(yao)(yao)(yao),而(er)(er)八(ba)、六(liu)(liu)(liu)都(dou)是(shi)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)爻(yao)(yao)(yao)。陽(yang)(yang)爻(yao)(yao)(yao)兩(liang)營(ying)數(shu)(shu)中取(qu)大者(zhe)(zhe)(九(jiu)、老(lao)陽(yang)(yang)),陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)爻(yao)(yao)(yao)兩(liang)營(ying)數(shu)(shu)中取(qu)小者(zhe)(zhe)(六(liu)(liu)(liu)、老(lao)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)),以(yi)陽(yang)(yang)之(zhi)盛者(zhe)(zhe)指(zhi)代陽(yang)(yang)爻(yao)(yao)(yao),以(yi)陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)之(zhi)盛者(zhe)(zhe)指(zhi)代陰(yin)(yin)(yin)(yin)(yin)(yin)(yin)爻(yao)(yao)(yao)。...
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