Chapter XXX. How tears ought not to be squeezed out, when they do not flow spontaneously. From these tears those are vastly different which are squeezed out from dry eyes while the heart is hard: and although we cannot believe that these are altogether fruitless (for the attempt to shed them is made with a good intention, especially by those who have not yet been able to attain to perfect knowledge or to be thoroughly cleansed from the stains of past or present sins), yet certainly the flow of tears ought not to be thus forced out by those who have already advanced to the love of virtue, nor should the weeping of the outward man be with great labour attempted, as even if it is produced it will never attain the rich copiousness of spontaneous tears. For it will rather cast down the soul of the suppliant by his endeavours, and humiliate him, and plunge him in human affairs and draw him away from the celestial heights, wherein the awed mind of one who prays should be steadfastly fixed, and will force it to relax its hold on its prayers and grow sick from barren and forced tears.