It's perhaps just the luck of the draw. Some are destined to dream their dreams and only dream of living them. There are also those who dream real dreams, believe they are but dreams, soften the edges of those dreams, and chase the shadow. Then there are those who live them.
We all dream.
We cannot avoid it, and even if you believe you do not, you're only deceiving yourself. When you wake up from a dream and can't remember it, it doesn't mean it didn't happen. Even if all you remember is closing your eyes and waking up, you dreamt while sleeping. However, when we dream, our conscious mind and subconscious mind synthesize a fantastic world of abject horror and unfathomable jubilation. The real world (or what we would like to believe is real) is a muddling in between those two extremes. But it is with the help of this muddle that we are able to see the extremes. Our dreams are a composition of the glorified muddle.
But it is that composite that gives us hope. Perhaps not a particular subconscious REM romp, but our hopes, dreams, and aspirations. They come from within us and without us. They give us something to strive for. Something that we might become, or attain. And, we must give them life. We cannot allow them to remain mystical mental illusions. We must live them.
It's something that I've done all my life. Of course there have been exceptions, but on the whole, if I have a dream, or aspiration, I put myself to work to attain it. If I want to sing a duet for someone's wedding, I do it. If I want to write a great philosophic work, I do it. If I want to travel the world, I do it. Sitting on my hands was never an option. It allows a meaningless reality to consume me. Our reality does not have to be meaningless, and we can consume it.
Live your dreams.