{From that time began} (apo tote (8872)xato). It was a
suitable time for the disclosure of the greatest secret of his
death. It is now just a little over six months before the cross.
They must know it now to be ready then. The great confession of
Peter made this seem an appropriate time. He will repeat the
warnings ( 17:22f.  with mention of betrayal;  20:17-19  with the
cross) which he now "began." So the necessity (dei, must) of
his suffering death at the hands of the Jerusalem ecclesiastics
who have dogged his steps in Galilee is now plainly stated. Jesus
added his resurrection "on the third day" (	(8869) trit(8869) h(886d)er(8369)),
not "on the fourth day," please observe. Dimly the shocked
disciples grasped something of what Jesus said.