A Crucial Riddle This Is

A very vital thing I am

That no one can survive without me

I light your every path

Don't mistake me for my twin brother

Though we sound the same

We are totally different

Hint :

This thing always moves

Sun!

because

it creates light and without the sun, nothing can live. The sun is not the same thing as a son! And it always moves.

• Correct answer :) – Kevin L Aug 18 '18 at 4:26
• Oh, so close I was – Duck Aug 18 '18 at 4:27
• I know right. Did the hint give it away or was it something else? @1848 – Kevin L Aug 18 '18 at 4:27
• Did you know I've never got a question right in puzzling stack exchange? – Duck Aug 18 '18 at 4:28
• Really? I thought you were one of the best users in this site @Duck – Kevin L Aug 18 '18 at 4:28

light?

No one can survive without

light

I light your every path

yes, light lights stuff

Don't mistake me for my twin brother

light, as in this feather is very light

We sound the same though

yes, they do

We are totally different

In meaning, yes

• +1 Nice answer but unfortunately incorrect! That's a very close answer still :) – Kevin L Aug 18 '18 at 4:19
• Is it bright? That would be close – Duck Aug 18 '18 at 4:20
• Wrong answer mate. Just added a hint :) – Kevin L Aug 18 '18 at 4:21
• Oh, ok, I'll think of something else – Duck Aug 18 '18 at 4:22
• Is the answer eyes? – Duck Aug 18 '18 at 4:23