Alphonsus Rodriguez quotes:

Lord, if Thou knowest that I shall find, on leaving the house, even through obedience, an occasion of offending Thee, I conjure Thee to take away my life here, where Thou are really present, for Thou solely art my life, and I prefer a thousand deaths to causing Thee the slightest displeasure.

You must strive with all possible care to please God in such a manner as neither to do nor behold anything, without first consulting Him, and in everything to seek Him alone and His glory.

It is a common teaching of the Saints that one of the principal means of leading a good and exemplary life is certainly modesty and the mortification of the eyes. Just as there is nothing better than modesty to preserve devotion in a soul and to edify one's neighbor, so too, there is nothing worse than immodesty and licentious glances to expose a person to the danger of becoming lax and loose in morals.

Some persons are so inclined to mortify themselves that at every opportunity they have, they do so. What a beautiful practice this is, and how profitable!