"Things do not happen. Things are made to happen."
"Change is the law of life. And those who look only to the past or the present are certain to miss the future."
"There are risks and costs to action. But they are far less than the long-range risks of comfortable inaction."
"We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard."
"The time to repair the roof is when the sun is shining."
"Let us never negotiate out of fear. But let us never fear to negotiate."
"Leadership and learning are indispensable to each other."
"Every accomplishment starts with the decision to try."
"Do not pray for easy lives. Pray to be stronger men."
"Those who dare to fail miserably can achieve greatly."
"In the long history of the world, only a few generations have been granted the role of defending freedom in its hour of maximum danger. I do not shrink from this responsibility—I welcome it."
"We stand today on the edge of a new frontier...a frontier of unknown opportunities and perils. But the New Frontier of which I speak is not a set of promises – it is a set of challenges."