When you're in the thick of it, it's hard to think those words. One day, you'll be happy. It feels like lying to yourself because when you're there and you're suffering, it is so damn hard to see the light at the end of the tunnel. Luckily, Steve had Sam and if Sam wasn't a glowing ray of sunshine at the end of a dark night, he didn't know what was. Sam had been through the mill, just like Steve, he had faced the darkness and he did it even more alone than Steve had. And Sam had made it out alive.
One day, you'll be happy, Sam had said, and because Steve could see the light glinting, he dared to believe him.