God Teaches Us to Be Guided by Those Who Are Advanced on the Way (On Discernment)

Saint John Cassian. "On the Holy Fathers of Sketis And on Discrimination". Written for Abba Leontios. From Philokalia, Vol. 1.

'From all that has been said, we may conclude that nothing leads so surely to salvation as to confess our private thoughts to those fathers most graced with the power of discrimination, and in our pursuit of holiness to be guided by them rather than by our own thoughts and judgment. Nor should the fact that we may encounter an elder who is somewhat simple-minded or lacking in experience either prevent us from confessing to the fathers who are truly qualified, or make us despise our ancestral traditions. Many texts from the divine Scriptures make it clear that the fathers did not say these things according to their own-lights, but were inspired by God Himself and by the Scriptures to hand down to their successors the tradition of asking advice from those who had traveled far along the spiritual path. This is borne out especially by the story of the holy Samuel, who from infancy was dedicated by his mother to God and was granted communion with Him. He still did not trust his own thoughts, and in spite of having been called three times by God, he went to the elder, Eli, and was instructed and guided by him about how he should answer God (cf. 1 Sam. 3:9-10). Although God called him personally, none the less He wanted Samuel to receive the guidance and discipline of the elder, so that by means of this example we too might be led towards humility.

True Discernment Comes from True Humility

Saint John Cassian. "Conferences".

The Second Conference of Abbot Moses. On Discretion.

Chapter X. The answer how true discretion may be gained.

THEN MOSES: True discretion, said he, is only secured by true humility. And of this humility the first proof is given by reserving everything (not only what you do but also what you think), for the scrutiny of the elders, so as not to trust at all in your own judgment but to acquiesce in their decisions in all points, and to acknowledge what ought to be considered good or bad by their traditions.[99] And this habit will not only teach a young man to walk in the right path through the true way of discretion, but will also keep him unhurt by all the crafts and deceits of the enemy. For a man cannot possibly be deceived, who lives not by his own judgment but according to the example of the elders, nor will our crafty foe be able to abuse the ignorance of one who is not accustomed from false modesty to conceal all the thoughts which rise in his heart, but either checks them or suffers them to remain, in accordance with the ripened judgment of the elders. For a wrong thought is enfeebled at the moment that it is discovered: and even before the sentence of discretion has been given, the foul serpent is by the power of confession dragged out, so to speak, from his dark under-ground cavern, and in some sense shown up and sent away in disgrace. For evil thoughts will hold sway in us just so long as they are hidden in the heart: and that you may gather still more effectually the power of this judgment I will tell you what Abbot Serapion did,[100] and what he used often to tell to the younger brethren for their edification.

http://oprelesti.ru/index.php/what-is-spiritual-delusion/338-true-discernment-comes-from-true-humility

A False Angel Told a Man to Sacrifice His Son

Saint John Cassian. "Conferences".

The Second Conference of Abbot Moses. On Discretion.

Chapter VII. Of an illusion into which another fell for lack of discretion.

Why also should I speak of one (whose name we had rather not mention as he is still alive), who for a long while received a devil in the brightness of an angelic form, and was often deceived by countless revelations from him and believed that he was a messenger of righteousness: for when these were granted, every night he provided a light in his cell without the need of any lamp. At last he was ordered by the devil to offer up to God his own son who was living with him in the monastery, in order that his merits might by this sacrifice be made equal to those of the patriarch Abraham. And he was so far seduced by his persuasion that he would really have committed the murder unless his son had seen him getting ready the knife and sharpening it with unusual care, and looking for the chains with which he meant to tie him up for the sacrifice when he was going to offer him up; and had fled away in terror with a presentiment of the coming crime.

http://oprelesti.ru/index.php/kinds-of-spiritual-delusion/134-false-visions/332-a-false-angel-told-a-man-to-sacrifice-his-son