How accidie hinders the mind from all contemplation of the virtues.
All the inconveniences of this disease are admirably expressed by David in a single verse, where he says, “My soul slept from weariness,” that is, from accidie. Quite rightly does he say, not that his body, but that his soul slept. For in truth the soul which is wounded by the shaft of this passion does sleep, as regards all contemplation of the virtues and insight of the spiritual senses.
Source: Institutes (New Advent)