  In the paper the Schrodinger equation (SE) with gravity term is developed and
discussed. It is shown that the modified SE is valid for particles with mass
m<M_P, M_P is the Planck mass, and contains the part which, we argue describes
the pilot wave. For m \to M_P the modified SE has the solution with oscillatory
term, i.e. strings. Key words: Schrodinger-Newton equation; Planck time; pilot
wave.
