A simile is a figure of speech in which two unlike things are compared using the words "like" and "as." President Kennedy's Inaugural Address is full of descriptive language, very eloquent, and to the point. I searched the whole piece and found two different passages containing similes (with references to the specific paragraphs they are in):
" . . . we observe today not a victory of party, but a celebration of freedom --symbolizing an end, as well as a beginning--signifying renewal, as well as change . . . " Paragraph 1
" . . . Now the trumpet summons us again--not as a call to bear arms, though arms we need--not as a call to battle, though embattled we are--" Paragraph 22
The entire speech can be found on many different websites, as well as in assorted reference books around the country. Audio recordings have also been produced and archived for history's benefit.