Look at Sandra Lidice Aldama, who chose to start a small business. Cubans, she said, can “innovate and adapt without losing our identity…our secret is in not copying or imitating but simply being ourselves.”
Here President Obama is using an example to show how Cuban people can still maintain their cultural identity while starting a new economic endeavor. He's trying to ease some of the people who may think they'll lose part of themselves by doing capitalistic things like starting a business.
It is time, now, for us to leave the past behind. It is time for us to look forward to the future together -- un future de esperanza.
President Obama uses anaphora here to stress the points he's made and to make his argument memorable. He's trying motivate the citizens to start afresh to start building the countries together.
I have come here to bury the last remnant of the Cold War in the Americas. (Applause.) I have come here to extend the hand of friendship to the Cuban people. (Applause.)
President Obama uses anaphora to make an appeal towards Cubans to try to unite the two countries. He's speaking to the audience's emotional side.