There is a very serious mistake that many people make when they think about the perfection of the great scholars and righteous people of the past. They focus solely on the end result of all the years these great people spent working on themselves and overlook the conflicts they had to overcome. The impression is given they were born great and needed no effort to become that way. We do not know about all their inner battles or their falls and mistakes along the way. The result of this is that when a strongly motivated person with high aspirations comes across obstacles and pitfalls he becomes discouraged and feels like giving up. The truth is that everyone feels downhearted at times. Do not expect your path to be an easy one. Regardless of how many times you fall, keep getting up and continue striving and you are guaranteed success in the end.
(Pachad Yitzchok, Igros Uksovim, p.217; Gateway to Happiness, p.379)