Lyndon Johnson actually said...

"I hope, too, that your hearts may be filled with peace within, as your country so earnestly seeks peace in the world."

"I told His Holiness that America welcomed his efforts to bring an end to the strife and sorrow."

"I wanted to promise him--as I have promised you, my fellow Americans--that the disappointments we had known in the past would never deter us from again trying any reasonable route to negotiations."

"Your cause is just."