2 Corinthians 12:9-10 says, "But he said to me, “My grace is sufficient for you, for my power is made perfect in weakness.” Therefore I will boast all the more gladly of my weaknesses, so that the power of Christ may rest upon me. For the sake of Christ, then, I am content with weaknesses, insults, hardships, persecutions, and calamities. For when I am weak, then I am strong."
Those words came from Paul when he was telling the Corinthians that although he was weak, he was really strong. He talked faith and it didn't matter what he was dealing with, he knew he was strong even in his weak moments. And he wanted to stay humble in that. We can get through the valley when we know from where us strength comes from too. And even though insults, hardships, persecutions, and calamities may come, we can still remain strong despite it all.
Let Paul be inspiration to us that even when things are not going too hot, we can still remain optimistic, positive, and strong despite it all.