John Kennedy actually said...

It is customary for speakers on these occasions to say in graduating addresses that commencement signifies the beginning instead of an end.

I want to express very warm appreciation to all of you for your generous welcome and for coming out to greet us.

For the first time in the history of the world we do know how to produce enough food now to feed every man, woman, and child in the world.

The amendment made by this Order shall not affect any act done, or any right accruing or accrued or any suit or proceeding had or commenced ...