.metsys troppus efil decnalab-yltbus ,xelpmoc A .erehpsoib a ,htraE !ior el EVIV ,trom tse ior eL segnahc era ereht ,llits dnA segnahc gnihton tuB gnignahc era sgnihT .orez eerht-renin eno era uoy regoR .lortnoC noissiM si siht ,enO atleD yaR-X There's no teacher who can teach anything new. He can just help us to understand the things we always knew.