Without me your body won't run, My restorative abilities are second to none, Just lower your lids and drift into the abyss, Don't worry, this abyss is really fun

I rise without wings, descend without a fall, guiding feet to every floor, a zigzagged hall.

It is most common word in English language, speak without it and you do not sound like a native speaker. It is definite article and beginning of Beatles, Rolling Stones, and Weeknd.

I shed my past without regret, slipping through grass without a step.

I dance on pages, bright and loud, A neon whisper, bold and proud. I never write, yet mark the way, Pointing out what must stay. I kiss the lines you shouldn’t miss, With glowing strokes of scholarly bliss. Not quite a pen, not quite a writer, What tool am I, that shines much brighter