The key to gaining mastery over sin is to realise that you cannot do it alone without inner peace and certainty of success. The more you fear and struggle, the more sin sucks you in. Watch this:
Though Bear Grylls manages to extricate himself, it is only because he is secure in the knowledge that the film crew will save his life, should he fail, by throwing him a rope, and that he is well trained in the practice. Understanding the physics of subduction helps him too.
We face quicksands of sin throughout our lives, right up to the hour of our death. We must rest assured that Mary, the Angels and the Saints are there, watching, ready to offer assistance,
by throwing us a Vine.