If you think one small change is all you need, you limit yourself. Significant changes are extensive, though you may not appreciate them for their lack of drama.
We take space for granted but there are no linear distances or dimensions in your thoughts. Mind-space is something that emerges dynamically from the way thoughts build themselves.
Enlightened people live close to their weakness, while those those with unflagging strength are often dull minded. Why is this? Is enlightenment a weakness and stupidity a strength?