Apparently, at least on one occasion, he was also perceptive. A story went around that after fleeing to the UK, and in the midst of all the doom and gloom prevalent in late 1941, he was in a conference with a group of advisers.
The door burst open and an aide blurted out that America had been attacked at Pearl Harbor. Germany and Italy wouldn't declare war on us until Dec. 11, yet DeGaulle told them "We have won the war."
Stupefied, they asked him why, and he pointed out that Germany would soon declare war on the U.S. and that they would be drowned in America's military productivity.
DeGaulle was a good man.