“Whatever our mind has been thinking of before the hour of prayer, is sure to occur to us while we are praying through the activity of the memory. Wherefore what we want to find ourselves like while we are praying, that we ought to prepare ourselves to be before the time for prayer.”
St John Cassian, First Conference of Abbot Isaac
Our mind wanders so much during prayer, doesn’t it? I know mine does. And so what St. John says here holds very true. If we are surrounding ourselves with heavenly things, then when it comes time for prayer, at the least, heavenly things will be in and on our mind. This will snowball -if you will permit my poor analogy- and build upon itself. Holiness begets holiness. As well, sin begets sin.