  Mach's principle asserts that the inertial mass of a body is related to the
distribution of other distant bodies. This means that in the absence of other
bodies, a single body has no mass. In this case, talking about motion is not
possible, because the detection of motion is possible only relative to other
bodies. But in physics we are faced with situations that are not fully Machian.
As in the case of general theory of relativity where geodesics exist in the
absence of any matter, the motion has meaning. Another example which is the
main topic of our discussion, refers to Bohmian quantum mechanics, where the
inertial mass of a single particle does not vanish, but is modified. We can
call such situations in which motion or mass of a single particle has meaning,
pseudo-Machian situations. In this paper, we use the Machian or pseudo-Machian
considerations to clarify under what circumstances and how a Machian effect
leads us to Bohmian quantum mechanics. Then, we shall get the Bohmian quantum
potential and its higher order terms for the Klein-Gordon particle through
Machian considerations, without using any quantum mechanical postulate or
operator formalism.
