Richard Nixon actually said...
I think perhaps the most appropriate comment I could make with regard to your husband, Mrs. Goddard, is to quote one of my favorite quotations: The reason that we can see further than the ancients is that we stand on the shoulders of the giants who have gone before us.
Context
Remarks on Presenting the Robert H. Goddard Memorial Trophy to the Apollo 8 Astronauts.
03/04/1969