This is what an excellent teacher does; he does not follow his disciples' fancy everywhere, but leads them to his own mind, and pulls up the thorns, and then puts the seed in, and does not answer at once in all cases to the questions put to him.
Saint John Chrysostom"He passed over his fall, and appointed him first of the Apostles; wherefore He said: ' 'Simon, Simon,' etc. (in Ps. cxxix. 2). God allowed him to fall, because He meant to make him ruler over the whole world, that, remembering his own fall, he might forgive those who should slip in the future. And that what I have said is no guess, listen to Christ Himself saying: 'Simon, Simon, etc.'"
Saint John Chrysostom