sentence: the emblem was a crane , alert and vigilant , holding a pebble to splash itself awake should its alertness falter , however the pebble and ` vigilance ' initially chosen as the motto , have evolved under mrs knight and the board of governors at the time ( 2004-2009 ) to a more self-analytical motto , reflecting the greater achievement of society at large , and appreciating one 's own ideas and successes as much as those as others .