  We discuss some known approaches and results as well as few new ideas
concerning origins and nature of neutrino mass. The key issues include (i)
connections of neutrino and charged fermions masses, relation between masses
and mixing, energy scale of new physics behind neutrino mass where
possibilities spread from the Planck and GUT masses down to a sub-eV scale. The
data hint two different new physics involved in generation of neutrino mass.
Determination of the CP phase as well as mass hierarchy can play important role
in identification of new physics. It may happen that sterile neutrinos provide
the key to resolve the riddle.
