We have to realize that if and when you fall occasionally, IT SHOULD NOT GET YOU DOWN!!! The very fact that the falling makes you feel bad and guilty shows how high you have climbed! That same "falling" was everyday happening in the "old you" and you didn't give it a second thought!
I came across a Tosfos Yom Tov in Avos which I would like to share with you. One of the miracles that occurred during the time of the Bais Hamikdash was that the Kohen Godel never had to be replaced by a different Kohen during Yom Kippur because he became a Baal Keri. The question is, that since the Kohen was placed in a special room seven days before Yom Kippur where he would be B'Keduasha Ub'Tahara as seen in Meseches Yuma, then why should he become a Baal Keri? On this the Tosfos Yom Tov (B'shem Midrash Shmuel) answers that the Yetzer Tov and the Yetzer Hora are fighting a big battle and when the Yetzer Hora sees he's losing, he strengthens himself with all his might and could bring the Kohen to become a Baal Keri. And he brings as an example, just as we see that many dying men, right before they die they strengthen themselves and start talking as healthy men...
From this we see that falling is a sign of a falling Yetzer Hora and a strong you/us.