Our Master has been emphasizing the importance of change all along. In his own words, change is life and without change life cannot exist. All change starts from the centre, so we have to start changing our universe from the centre of that universe, which is our own heart. That is the main reason why Sahaj Marg teaches meditation on the heart.
To learn more go to Master's talk at  http://www.sahajmarg.org/literature/online/speeches/the-need-for-change