  We offer a concise and direct way to derive the bending angle of light (i.e.
as generally called, gravitational lensing), while light grazes a star, through
the approach suggested earlier by the first author, which is fundamentally
based on the energy conservation law and the weak equivalence principle. We
come out with the same result as that of the general theory of relativity
(GTR), although the philosophies behind are totally different from each other.
We emphasize that in our approach, there is no need to draw a distinction
between light and ordinary matter, which makes our approach of gravity
potentially compatible with quantum mechanics. Furthermore, our equation that
furnishes gravitational lensing, also furnishes the result about the precession
of the perihelion of a planet. The results obtained are discussed.
