How we cite our quotes: (Line)
Quote #7
If you can force your heart and nerve and sinew
To serve your turn long after they are gone,
And so hold on when there is nothing in you
Except the Will which says to them: "Hold on!" (21-24)
Stoicism is also about strength and endurance. Just look at the language in these lines: "force," "serve," "hold on," "Hold on!" It is just as important to press on, even when you feel like your body is broke, as it is to calmly endure disappointment.
Quote #8
If neither foes nor loving friends can hurt you,
If all men count with you, but none too much: (27-28)
Stoicism is about making oneself invincible, as much as that is possible. Friends hurt us, and so do foes, but we should always try to not let that happen. We need to put on metaphorical armor if we want to succeed.
Quote #9
If you can fill the unforgiving minute
With sixty seconds' worth of distance run, (29-30)
The strength and endurance aspect of stoicism is brought up again, this time with a metaphor about making the most of an "unforgiving minute." Life is short, that's for sure, so you might as well stoically do the best you can—go the "distance," as they say.