A mind should be strong enough to remain steadfast in the face of adversity, but pliable enough to adapt to changing surroundings. The mind that is fixed is a mind that is closed. A mind should be open like a parachute to be effective. You wouldn’t think of jumping out of a plane without having access to a parachute that can open. Do not think of going through life with a mind that is closed; dark and damp inside, refusing to allow light in it.