We read last week about the Meraglim. The sin of the Meraglim was that they believed "it could not be done". It is so easy to be guilty of the same sin, especially when dealing with the powerful desires of the Yetzer Hara. We must realise that even if someone could think that it's not physically possible for him to break free of his addictions, G-d is not limited to his abilities. Many people who originally thought it was impossible, learned to put their full trust in G-d and give over to him their addiction and desires. Just like a child trusts his father and jumps into his waiting arms--even from a height--without the slightest fear, we need to be able to just "let go" of our desires and trust fully that G-d will take care of us. If we do this, then he will indeed bring us through the desert and into Eretz Yisrael. As it is written: "Zacharti Lach Chesed Ne'urayich - Lech tech acharai Bamidbar..." - "I remember the kindness of your youth (i.e. how you gave over your trust) [when I said to you:] "follow me into the barren desert"...