A purified mind can grasp anything. It can dive deep into the subtlest subject and understand even transcendental things.
SivanandaThe mind is responsible for the feelings of pleasure and pain. Control of the mind is the highest Yoga.
SivanandaGive up salt, give up sugar, give up spices, give up vegetables, give up chutnies, give up tamarind. Serve Bhangis, serve rogues, serve inferiors, remove faecal matter. Do not revenge, resist not evil, return good for evil, bear insult and injury. Forget like a child any injury done by somebody immediately. Never keep it in the heart. It kindles hatred.
Sivananda