He becomes more empathetic. Through the memories he has received, he has experienced a wide range of emotions and situations that others in his community haven't. This has made him more understanding of different feelings. He realizes the importance of things like real love, which his community has tried to suppress. He has seen the pain and joy in the memories and this has changed him into a more empathetic person. He now understands the value of individual feelings and experiences, which is completely different from his community's idea of sameness.
Jonas is also determined. Despite all the difficulties and the fear of the new world outside his community, he doesn't give up. He is set on finding a better place and a new way of life. He holds onto the memories he has received and uses them as a driving force to keep going. For example, the memories of love and family give him the strength to endure hardships on his journey. He knows that the community he left behind is in a wrong state of being, and he is determined to break free from it and perhaps one day change it.