Scarcely perceptible at first, …negligence permeates everything and not only poisons the will, planting in it all kind of effort and all forms of spiritual doing and obedience, but also blinds the mind, and prevents it from seeing all the folly and falsehood of the arguments which support this disposition of will; for it hinders the mind from presenting to the consciousness the sound reasoning, which would have the power of moving the slothful will to perform the necessary work as quickly and diligently as possible, without putting it off till another time. For it is not enough to perform the work quickly; each thing has to be done in its proper time, as required by its nature, and needs to be performed with full attention and care, to make it as perfect as possible. Listen to what is written ‘Cursed be he that does the work of the Lord deceitfully’ (Jer 31:10). And you incur this disaster, because you are too lazy to think of the value and worth of the work you have to do; for this thought would impel you to do it in its proper time and with such resolution as to banish all the thoughts of the accompanying difficulties, which laziness suggests in order to turn you away. Let the conviction never leave your thought that a single raising of your mind to God, and a single humble genuflexion to His glory and in His honor has infinitely more value than all the treasures of the world….
“On Overcoming Negligence,” Unseen Warfare