The problem is that you need the same number of bits of entropy. I estimate that "6tFcVbNh^TfCvBn" has about 90 bits of entropy. So if you want to come up with

The problem is that you need the same number of bits of entropy. I estimate that "6tFcVbNh^TfCvBn" has about 90 bits of entropy. So if you want to come up with a pass phrase that's equally secure, it has to be just as hard to remember as that password, otherwise it can be brute forced more easily by somebody who knows you very well. So it could be 5 to 6 truly random words from a dictionary. But as soon as you come up with a phrase that's easier to remember than 5 or 6 truly random words, it becomes easier to attack again.