the secret

You wish to know my secret?
for you, shall it be told
but you must  promise
to keep it a secret
promise to neither spill nor leak.
it is for a reason.
Be cautious !
The secret is tasteless---
tongues know it.
the secret is toxic
ask the dead blades of brown grass.
the secret is sly,
even my cat could'nt 'whisker' it!
the secret is uncontrollable
(yet I assume u can do so!)
and yes not to mention
its everywhere
invisible to naked eyes.
covered in a cloak
a cloak yet again invisible!
Do u wish to unravel it?
Yes?
No... you cant
coz after all its a Secret.