Nicene and Post-Nicene Fathers: Series II/Volume XI/John Cassian/Conferences of John Cassian, Part I/Conference IX/Chapter 7

Chapter VII.

A question how it is that it is harder work to preserve than to originate good thoughts.

could keep as a lasting possession those spiritual thoughts in the same way and with the same ease with which we generally conceive their germs! for when they have been conceived in our hearts either through the recollection of the Scriptures or by the memory of some spiritual actions, or by gazing upon heavenly mysteries, they vanish all too soon and disappear by a sort of unnoticed flight. And when our soul has discovered some other occasions for spiritual emotions, different ones again crowd in upon us, and those which we had grasped are scattered, and lightly fly away so that the mind retaining no persistency, and keeping of its own power no firm hand over holy thoughts, must be thought, even when it does seem to retain them for a while, to have conceived them at random and not of set purpose. For how can we think that their rise should be ascribed to our own will, if they do not last and remain with us? But that we may not owing to the consideration of this question wander any further from the plan of the discourse we had commenced, or delay any longer the explanation promised of the nature of prayer, we will keep this for its own time, and ask to be informed at once of the character of prayer, especially as the blessed Apostle exhorts us at no time to cease from it, saying &#8220;Pray without ceasing.&#8221; And so we want to be taught first of its character, i.e., how prayer ought always to be offered up, and then how we can secure this, whatever it is, and practise it without ceasing. For that it cannot be done by any light purpose of heart both daily experience and the explanation of four holiness show us, as you have laid it down that the aim of a monk, and the height of all perfection consist in the consummation of prayer.
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