I have not been getting enough sleep recently.  I am tired
sleep is a natural state of the body and mind . It restricts all your muscles and make you numb to everything around you so you can relax so please get some
Yes it is important to get enough sleep!
sleep is not same as wakefulness which reduces your being able to react to things around you. 
That is very true.  And there are varying levels of sleep
and non-REM sleep. Although REM stands for "rapid eye movement", this mode of sleep has many other aspects, including virtual paralysis of the body. A well-known feature of sleep is the dream, an experience typically recounted in narrative form, which resembles waking life while in progress, but which usually can later be distinguished as fantasy.
During sleep, most of the body's systems are in an anabolic state, helping to restore the immune, nervous, skeletal, and muscular systems; these
I was sick and tired of everything // When I called you last night from Glasgow // All I do is eat and sleep and sing // Wishing every show was the last show". However the song shifts viewpoint in the lines: "Facing 20,000 of your friends // How can anyone be so lonely // Part of a success that never ends // Still I'm thinking about you only".
Even though ABBA members continue their musical careers as solo artists, they have not regrouped as ABBA for a concert tour.