The spiritual part of the human being, i.e. soul, mind, spirit, etc., reveals its spiritual nature most simply insofar as it is not bound by time and space. Unlike the body, which (apart from the most extraordinary phenomena) can only be where it happens to be in space and time, the mind, soul, and spirit do not have to be in the same place as the body. Through memory, the mind can place itself in the past, or it can be present to the future through imagination. The inner attention can be somewhere else apart from where our body is; somewhere we have visited perhaps, or would like to go.
That our spiritual nature is not bound by space or time is the means of prayer at the most basic level. We can 'raise heart and mind' to God and be present to the Ultimate and Infinite rather than the contingent and finite things of this world. We can take a peaceful walk and work through our memory, allowing our heart and soul to travel through time in search of a greater understanding and acceptance of the present. These uses of our spiritual power are very good and salutary things, and help us to be more human.
But this powerful faculty of our spirit is also dangerous and the occasion of many pitfalls. The ability of our soul and inner attention to be somewhere else can be misused. We can go through our days with no attention to the moments that God puts before us. The grace of God unfolds before us but we miss it because our soul is somewhere else. To be sure, we might be about something very pious in our mind and soul, like preparing a homily or a pious blog post, but we are nonetheless failing because we are not mindful of the present where God is always revealed in a privileged way. If we are naturally bright and a good multi-tasker, we can even seem like we are listening to someone or working quietly, but all the time we are going over something else and talking to ourselves or running 'tapes' in our head and not really paying attention. And then we find ourselves unhappy and we don't know why. We are unhappy because we have spent all our time living in an unreality.