What is JFK trying to do in this speech?

The JFK was president Kennedy speech the purpose was that believed in the power of words - - both written and spoken - - to win votes, to set goals, to change minds, to move nations.

the messeage was On January 20, 1961, President John F. Kennedy delivered his inaugural address in which he announced that "we shall pay any price, bear any burden, meet any hardship, support any friend, oppose any foe to assure the survival and success of liberty."