Which line contains figurative language?

Can't is the word that is foe to ambition

Whatever the goal you are seeking, keep trying

If neither foes nor loving friends can hurt you;

If you can wait and not be tired by waiting,

I believe the line is Can't is the word that is foe to ambition

If translated to its literal meaning, foe means a person who meant you harms. But in this line, it has a similar meaning as a hindrance or a challenge.

Because the actual meaning is different from the literal meaning, we could consider this line containing figurative language.

I think it's line 1. i'm not a hundred percent sure