Answer:
I am a path between high natural masses; remove the first letter to get a path between man-made masses.
Born of sorrow, grow with age, you need a lot of me to be a sage. What am I?
I am whole but incomplete. I have no eyes yet I see. You can see and see right through me. My largest part is one fourth of what I once was.
I am between earth and heaven. What am I?
I am flora not fauna. I am foliage not trees. I am shrubbery not grass.
If a man would carry my burden he would break his back I am not rich But leave silver in my track