Answered in example sentence
"Retentio," answered Sancho, "means that whoever is in hell never comes nor can come out of it, which will be the opposite case with your worship or my legs will be idle, that is if I have spurs to enliven Rocinante: let me once get to El Toboso and into the presence of my lady Dulcinea, and I will tell her such things of the follies and madnesses (for it is all one) that your worship has done and is still doing, that I will manage to make her softer than a glove though I find her harder than a cork tree; and with her sweet and honeyed answer I will come back through the air like a witch, and take your worship out of this purgatory that seems to be hell but is not, as there is hope of getting out of it; which, as I have said, those in hell have not, and I believe your worship will not say anything to the contrary."