  Among modified gravitational theories, the Tensor-Vector-Scalar (TeVeS)
occupies a special place -- it is a covariant theory of gravity that produces
the modified Newtonian dynamics (MOND) in the nonrelativistic weak field limit
and explains the astrophysical data at scales larger than that of the Solar
System, without the need of an excessive amount of invisible matter. We show
that, in contrast to other modified theories, TeVeS is free from ghosts. These
achievements make TeVeS (and its nonrelativistic limit) a viable theory of
gravity. A speculative outlook on the emergence of TeVeS from a quantum theory
is presented.
