Spiritual discipline is the set of regular practices that support inner growth: meditation, study, prayer, restraint, service, balanced living. Unlike short-term enthusiasm, it works through repetition. Many people begin with energy and then struggle to continue, or choose practices that do not fit their circumstances. The Gita offers guidance that is both demanding and realistic.
It begins with moderation. Gita 6.16 says yoga cannot be perfected through extremes, and Gita 6.17 says a balanced lifestyle in eating, recreation, work, sleep and wakefulness creates the ideal condition for yoga to remove sorrow. Gita 4.30 links regulated diet and control of vital energies with purification, and Gita 4.27 says knowledge-guided discipline can transform all activities into a means of spiritual growth. Gita 2.41 says a single-pointed mind moves steadily toward one goal.
The Gita also guards against both rigidity and discouragement. Gita 12.5 says the formless path is real but demanding for embodied beings, so choose a method that fits your present capacity. Gita 2.61 says control of the senses is steadiest when the mind rests on something higher, so build discipline on purpose, not willpower alone. Gita 6.44 says the force of earlier practice draws a seeker back, so trust that attraction and return to practice after a lapse.