sometimes the glass is half empty

Lately I spend my days reading a neuroanatomy test book in a dank laboratory room designed more for studying life than living it. I understand the investment I am making and the sacrifices I have to endure to chase this wee dream I am following. Sometimes though, it crawls up your back. I think about the imprudence of the decisions I've made in the last 2 years and wonder if it was indeed wise to make them. Yes, the experiences I've had over these last 18 months are unparalleled in my life and I am a new person because of them. In fact, I feel that I am a better person having lived them. Yet was gaining that ounce of personal insight a Pyrrhic victory? Would I be better off having stayed the course in the start-up job, having kids, allowing the house to appreciate, spending each day with someone who loves me? Ouch, these questions suck. I would love to lay awake and ponder away at these things, but class starts in 5 hours and I should probably sleep for at least 4 and a half of them.