What did President Kennedy mean when he said, “This nation has tossed its cap over the wall of space, and we have no choice but to follow it”?

it was a reference to Frank O’Connor, and the idea of following through with difficult goals.
It was a quote from Charles Lindbergh, and the idea of following your dreams.
It was a quote from Frank O’Connor, and the idea of leaving others behind.
It was a reference to Charles Lindbergh, and the idea of learning from mistakes