Granted to the Mystic

Palladius

Now to the mystic is granted the vision of God, and he is with Him Who cannot be seen, as if he saw Him, for when he has become constant in pure prayer, he shall be worthy to see within his own heart, even as in a polished mirror, the light of the revelation of the Godhead shining upon it.  

And when once the Vision has been granted, though it may be but briefly, it will be given again to the loving soul. Although the mind cannot be occupied with and stay with the divine Vision continually, still, when it is pressed by the thoughts it can fly to God, and it shall not be deprived of the divine Vision. But I say unto you that once the mind be made perfect in this respect, it shall be easier for you to move mountains than to bring it down from above.

Paradise of All the Fathers
Quoted in The Way of the Mystics, Margaret Smith

[In the Unitive State ("...once the Vision has been granted,...it will be given again to the loving soul.) In other words, it is known as a permanent condition - even without further experiences of God. The mind may be occupied with other things, but with the remembrance of what it now knows to be so, at any moment "...it can fly to God". And in the fullness of Vision ("...once the mind is made perfect...), nothing can even momentarily move it from God. May God grant us this perfect Vision. Amen.]