Being so stack focused, I found forth code of more than a couple of lines almost impossible to follow without a pen & paper or digital equivalent to keep track

Being so stack focused, I found forth code of more than a couple of lines almost impossible to follow without a pen & paper or digital equivalent to keep track of what the stack is doing at a given point in time in the program. I find many other languages far easier to dive into other peoples code and understand what data structrues they're working with and what they're attempting to do to it.