Strength is born in the deep silence of long-suffering hearts not amid joy.

Capacity is mostly built in long stretches nobody watches: years of carrying something quietly, without applause or visible progress. That describes where strength comes from rather than recommending you seek out pain, and anyone who has done the carrying knows there was nothing noble about most of it. What you gain is real, and the price was not chosen.

Inside one of those stretches, you are not failing because it is slow and unwitnessed. Find one person who knows what you are carrying, so the silence is not total. And if you know somebody in that position, say the thing out loud that tells them you have noticed.