You overlook the subtle difference between suffering and pain.

Pain is cramping up on mile 53. Suffering is mashing up three more hills and ten more miles while still cramping.

Pain is falling down and smacking your knee. Suffering is getting up and riding on with blood pouring down your knee.

Suffering is getting caught in a sudden, frigid downpour and pushing even faster even though the cold rain pelts your face, making you gasp for air like a cold shower, wet seeps into your shoes, drops obscure your view and still you push harder.

Suffering is extreme discomfort and pain ignored.