Change and the Mind

The characteristic energy of pure Mind is change, and the more our mentality acquires elevation and organisation, the more this law of Mind assumes the aspect of a continual enlargement, improvement and better arrangement of its gains and so of a continual passage from a smaller and simpler to a larger and more complex  perfection. For Mind, unlike bodily life, is infinite in its field, elastic in its expansion, easily variable in its formations. Change, then, self-enlargement and self improvement are its proper instincts. Mind too moves in cycles, but these are ever-enlarging spirals. Its faith is perfectibility, its watchword is progress.

Ref: The Synthesis of Yoga