The correct answer to this open question is the following.
Unfortunately, you did not attach the three quotes to use them as evidence. Without them, we do not have the references.
However, we can comment on the following to help you with some ideas.
One some teach history, it is a great opportunity to revisit what humans had done in the past and the way these events have influenced the present. Teaching history implies researching valid primary and secondary sources that give us a clear description of the different processes that humans lived to overcome difficult situations, develop technological devices, the resolution of conflicts, and the evolvement to create progress.
Another account could be the way history teaches us about the great sacrifices humans have made to fight for important things that we have today such as liberty, independence, and democracy. Humanity have passed stages of oppression, absolutism, tyranny, monarchies, dark ages, revolutions, hunger, and disease, to have the kind of life that we live today.
History teaches us to be grateful and appreciate the dedication and effort of people from the past because they directly influence the actions of the present time.