"You cannot step twice into the same river, for other waters are continually flowing in." -Heraclitus
Translation: Change happens.
"One of the greatest pains to human nature is the pain of a new idea." -Walter Bagehot
Translation: Change hurts.
"Taking a new step, uttering a new word is what people fear most" -Fyodor Dostoevsky
Translation: We resist change.
"You must be the change you wish to see in the world" -Mahatma Ghandi
Translation: Your response to change determines your future.