In the following sentence, does the phrase 'have the greater knowledge' mean 'understand well'?
"We all know that books burn, yet we have the greater knowledge that books cannot be killed by fire. People die, but books never die. No man and no force can put thought in a concentration camp forever. No man and no force can take from the world the books that embody man's eternal fight against tyranny of every kind."
- Franklin D. Roosevelt