In this quote hitter states exactly what happened it he explains how he took over. At the Time Germany was in depression so they were super desperate for a leader so Hitler rows to power. Hitler took advantage of Germany and almost lead to its destruction and ruined its reputation.
One of the themes of The Book THIEF is that words are very powerful. Depending on how they are used, words can be used either for good, or for bad. Hitler was able to take over Germany by making the people believe in the same ideas he had. He was a powerful speaker, and his words were what enabled him to rise to power.