Can the Mind Always Cling to God?

Who, then, while he is weighed down by our frail flesh, can be always so intent on this contemplation as never to think about the arrival of a brother, or visiting the sick, or manual labor, or at least about showing kindness to strangers and visitors? And finally, who is not interrupted by providing for the body and looking after it? Or how, and in what way, can the mind cling to the invisible and incomprehensible God? This we should like to learn.