Philosophy springs from the love of being; it is man's loving endeavor to perceive the order of being and attune himself to it. Gnosis desires dominion over being; in order to seize control of being the Gnostic constructs his system. The building of systems is a gnostic form of reasoning, not a philosophical one.
In order to approach a creation as sublime as the Bhagavad-gita with full understanding it is necessary to attune our soul to it.
Asanas attune the body to meditation, just as guitar is tuned before a performance.