Answer:
What word when read from left to right is a ruler, but when read from right to left is a servant?
I go up and never come down no matter how hard you wish. As I get higher, more wrinkles crawl on to the face. What am I?
I'm not a bird, but I can fly through the sky. I'm not a river, but I'm full of water. What am I?
I am a portal to another world which you cannot enter. Only you can see me but I can't see you.
Upon your lonely journey I accompany you, whether you travel through endless mountains or seas of blue. Wherever you go, I keep your place. Lost you're not, when I'm embraced. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?