Miracles of Transformation Do Occur

One of the books I've been reading is The Gift of Change by Marianne Williamson.
I came across this part here which I really felt summed up a lot of what I've discovered to be true.

"Miracles of transformation do occur, and they can occur in each of us.
Whenever our outer world remains stuck, it is incumbent upon us to look, not outward, but inward. It is a call to find the places in ourselves where we are holding on to old ways--where we blame others rather than taking personal responsibility for our woes: where we judge others instead of blessing them; where we are hard rather than vulnerable and open and kind. These issues hold the hidden keys to unlocking our unsolved personal mysteries. To achieve breakthroughs in the external world, we had best achieve internal ones. For the level of consciousness is the level of cause; addressing problems at their cause means addressing them inside our own selves. Addressing problems only on the level of their effects--in the outside world--is failing to address them deeply at all."