You could select from many entries in this part of the diary to see how these ideas are evoked. I think the most moving entry would have to be the last one. The closing line of seeking to create one's own destiny and life and sense of own if "there were no other people in this world" is powerful and strong enough, but acquires a greater meaning when understanding the historic context within which she is writing.
"In spite of everything, I still believe that people are really good at heart. I simply can't build up my hopes on a foundation consisting of confusion, misery and death. July 15, 1944."
This is the most heartbreaking entry of the entire volume because of the dramatic irony. The reader knows precisely the horror that lies in store for Anne. To see her hope in the face of such utter despair and human evil rends the heart of the reader. This line is used as the final line of the play based on Anne’s diary. To see this play performed and then to hear this line read at the end of the play is an incredibly powerful dramatic device. Unforgettable.
I agree that the last entry reveals the great extent to which Anne has evolved in her thinking. It really is a testimony to the voice that she could have been and the thinker the world sorely missed. I would say that this is probably my favorite. If I had another one, it would be the February 3, 1944, where the bleakness of the Holocaust is so perfectly revealed as Anne talks about how individuals face overwhelmingly difficult odds in the face of institutional machinery and when individuals have chosen silence over activism. While the bleakness is evident, there is that unique tone of hope that "everything will work out in the end." This is a uniquely human approach to enduring a situation which is about as far from human as one can get.