Hypnagogia is the experience of the transitional state from wakefulness to sleep: the hypnagogic state of consciousness, during the onset of sleep. In contradistinction, hypnopompia denotes the onset of wakefulness. The related words from the Greek are agōgos "leading", "inducing", pompe "act of sending", and hypnos "sleep".
Mental phenomena that occur during this "threshold consciousness" phase include lucid thought, lucid dreaming, hallucinations, and sleep paralysis.
Sometimes the word hypnagogia is used in a restricted sense to refer to the onset of sleep, and contrasted with hypnopompia, Frederic Myers's term for waking up. However, hypnagogia is also regularly employed in a more general sense that covers both falling asleep and waking up, and Havelock Ellis questioned the need for separate terms. Indeed, it is not always possible in practice to assign a particular episode of any given phenomenon to one or the other, given that the same kinds of experience occur in both, and that people may drift in and out of sleep. In this article hypnagogia will be used in the broader sense, unless otherwise stated or implied.
I wake up every day
To find myself in the same place
Surrounded by this life
Trapped inside this space and time
I'll find my way to escape
I want to leave this world behind
And travel like a spaceman
I want to walk the stars at night
I want to be the spaceman
I watch the skies go by
And think about a better life
So many miles away
From this mess that we've made