Answer:
I love spinach.
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves everyday
I have a tongue, but cannot speak. I have a bed but cannot sleep. I have four legs but cannot walk. Yet I move as you do. 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.
A necessity to some a treasure to many I'm best enjoyed among pleasant company. Some like me hot some like me cold. Some prefer mild some like me bold.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.