  The Schr\"odinger equation is universally accepted due to its excellent
predictions aligning with observed results within its defined conditions.
Nevertheless, it does not seem to possess the simplicity of fundamental laws,
such as Newton's laws of motion. Various insightful attempts have been made to
elucidate the rationale behind the Schr\"odinger equation. This paper seeks to
review existing explanations and propose some prospectives on the derivation of
the Schr\"odinger equation.
