> Sometimes, dreams can just be dreams.

If (for any reason) we know that dreams cannot be achieved, there is a clear cut. And while it might take time to accept the situation, this realization is Stoic/Zen.

It is way harder if there is a chance, we try, yet fail. When do we keep trying, and how do we do so without losing hope piece by piece? It might be even harder when the dream is not something like "win a gold medal in snowboarding", "build a unicorn startup" or "publish a bestseller". But it is in the line of having kids, or being healthy, or other things that a lot of people take for granted.