I don't generally think of nostalgia as a healthy thing. A sentimental longing for the 'good old days' can blind us to the things that were not right, and did not work. We need clear eyes so we can either keep up the good work, or go back to the drawing board if we messed up the first time.
So I'm not accepting the quote as a motto! I'm using it as a wake-up call, and a kind of anti-resolution for the New Year. Change must be embraced (we don't have a choice about that) but we shouldn't let it paralyse us.