It seems that this segment from the Muppet Show must have shimmered for me. Driving home just now I recalled it again. Many years after having seen it during my childhood I recalled it and looked for the source – which led me to Jim Croce. So here is the Muppet Show (which I was surprised to find online!) version followed by the original.
Inside
“The will develops in a warrior in spite of every opposition of the reason … The body must be perfection before the will is a functioning unit.”
Tales of Power
Tales of Power