I think it was Oliver Cromwell who said:
"You need not hope in order to undertake, and you need not succeed in order to persevere." The following sermons and podcasts are on Oliver Cromwell and the English Civil War:
"Vietnam is the Left's favorite war because America lost."
"Historical accounts of the Vietnam War are incomprehensible because liberals refuse to admit the failure of their national security strategy. The only important lesson from the Vietnam War is this: Democrats lose wars."
"In the great Democratic tradition of taking the nation to war without a plan to win, only the Democrats could have produced Vietnam."
"President Lyndon Johnson, who inherited the war when Kennedy was assassinated, viewed the Vietnam War as a method of proving the Democrats could be trusted with foreign policy, which they cannot."
"Nixon had been elected in part based on his promise to end the war honorably. He would have done so, too, but for Democrats in Congress,"
"A Republican President either wouldn't have started that war, or would have won it pretty fast."