Therefore sent he thither horses, and chariots, and a great host: and they came by night, and compassed the city about.
And when the servant of the man of God was risen early, and gone forth, behold, an host compassed the city both with horses and chariots. And his servant said unto him, Alas, my master! how shall we do?
And he answered, Fear not: for they that be with us are more than they that be with them.
And Elisha prayed, and said, Lord, I pray thee, open his eyes, that he may see. And the Lord opened the eyes of the young man; and he saw: and, behold, the mountain was full of horses and chariots of fire round about Elisha.
Then the Lord opened the eyes of Balaam, and he saw the angel of the Lord standing in the way, and his sword drawn in his hand: and he bowed down his head, and fell flat on his face.
And the angel of the Lord said unto him, Wherefore hast thou smitten thine ass these three times? behold, I went out to withstand thee, because thy way is perverse before me:
And the ass saw me, and turned from me these three times: unless she had turned from me, surely now also I had slain thee, and saved her alive.
And the Lord opened the eyes of the man; and he saw: and the mountain was full of horses and chariots of fire round about Elisha
Then the Lord opened the eyes of Balaam, and he saw the angel of the Lord standing in the way, and his sword drawn in his hand
If we cannot see the divine reality around us, then the behavior of those that do might seem like insanity. Like a prophet who has no care for the armies assembled against him, or a donkey that repeatedly turns from its path. It can be easy to only accept the worldly reality that we physically perceive, observe that the behavior of those who are spiritual are not in harmony with that reality, and simply reject them out of hand.
But of course, if the spiritual are observing another real reality, then it is our behavior that is then erratic and insane.
To be sure, there are such things as mirages and false paradigms and genuine insanity. There are perceived realities that others others hold which are not real. We should not believe every report that we are given. But we should be humble enough to suppose that we might not see everything as it really is. We should be open to the idea that perhaps we still have a need for our eyes to be opened.