▁the ▁practice ▁of ▁cont empl ation . ▁Second , ▁the ▁technique ▁of ▁" m aint aining ▁the ▁One ▁without ▁wa ver ing " ▁is ▁in ▁itself ▁completely ▁without ▁steps ▁or ▁grad ations . ▁One ▁concentr ates , ▁understand s , ▁and ▁is ▁en light ened , ▁all ▁in ▁one ▁und iffer enti ated ▁practice . Mc R ae ▁further ▁notes ▁that the ▁J TF M ▁makes ▁allow ance ▁for ▁both ▁sudden ▁app er ception ▁of ▁the ▁Bud d ha ▁Nature ▁and ▁grad ual ▁improvement ▁in ▁the ▁bright ness ▁and ▁pur ity ▁of ▁the ▁concentr ated ▁mind ... the ▁J TF M ▁actually ▁allows ▁for ▁a ▁number ▁of ▁alternative ▁situations : ▁One ▁may ▁achieve ▁" br ight ▁pur ity " ▁of ▁mind ▁either ▁with ▁or ▁without ▁undert aking ▁the ▁extended ▁practice ▁of ▁" view ing ▁the ▁mind ." ▁One ▁may ▁also ▁achieve ▁en light en ment ▁either ▁sole ly ▁through ▁one ' s ▁own ▁efforts ▁or , ▁convers ely , ▁with ▁the ▁aid ▁of ▁a ▁teacher ' s ▁instruction . ▁The ▁point ▁of ▁these ▁alternatives ▁is ▁that ▁a ▁true ▁teacher ▁must ▁be ▁able ▁to ▁understand ▁which ▁students ▁are ▁best ▁su ited ▁for ▁which ▁approach ▁and ▁to ▁teach ▁them ▁differently ▁on ▁the ▁basis ▁of ▁that ▁understanding . ▁ ▁Four th ▁Patri arch ▁Da ox in ▁( 四 <0xE7> <0xA5> <0x96> 道 信 ) ▁Da ox in ▁is ▁cred ited ▁with ▁several ▁important ▁innov ations ▁that ▁led ▁directly ▁to ▁the ▁ability ▁of ▁Chan ▁to ▁become ▁a ▁popular ▁religion . ▁Among ▁his ▁most ▁important ▁contributions ▁were :