▁receiving ▁the ▁E uchar ist ▁( H oly ▁Comm union ) ▁▁ 1 9 . ▁declaration ▁of ▁the ▁invalid ity ▁of ▁bapt ism ▁by ▁Paul ian ▁her et ics ▁▁ 2 0 . ▁prohib ition ▁of ▁kne eling ▁on ▁Sund ays ▁and ▁during ▁the ▁Pent ec ost ▁( the ▁fifty ▁days ▁comm encing ▁on ▁E aster ). ▁Stand ing ▁was ▁the ▁norm ative ▁post ure ▁for ▁prayer ▁at ▁this ▁time , ▁as ▁it ▁still ▁is ▁among ▁the ▁Eastern ▁Christians . ▁K ne eling ▁was ▁considered ▁most ▁appropriate ▁to ▁pen it ential ▁prayer , ▁as ▁distinct ▁from ▁the ▁fest ive ▁nature ▁of ▁E aster t ide ▁and ▁its ▁rem emb rance ▁every ▁Sunday . ▁The ▁canon ▁itself ▁was ▁designed ▁only ▁to ▁ensure ▁uniform ity ▁of ▁practice ▁at ▁the ▁designated ▁times . ▁ ▁On ▁ 2 5 ▁July ▁ 3 2 5 , ▁in ▁conclusion , ▁the ▁f athers ▁of ▁the ▁council ▁celebrated ▁the ▁Emperor ' s ▁tw enti eth ▁anni versary . ▁In ▁his ▁fare well ▁address , ▁Const antine ▁informed ▁the ▁audience ▁how ▁a verse ▁he ▁was ▁to ▁dog m atic ▁controvers y ; ▁he ▁wanted ▁the ▁Church ▁to ▁live ▁in ▁harm ony ▁and ▁peace . ▁In ▁a ▁circular ▁letter , ▁he ▁announced ▁the ▁accomplished ▁unity ▁of ▁practice ▁by ▁the ▁whole ▁Church ▁in ▁the ▁date ▁of ▁the ▁celebr ation ▁of ▁Christian ▁Pass over ▁( E aster ). ▁ ▁Effect s ▁of ▁the ▁council ▁▁ ▁The ▁long - term ▁effects ▁of ▁the ▁Council ▁of ▁N ica ea ▁were ▁significant . ▁For ▁the ▁first ▁time