thoughtful, change, group
When you jump for joy, beware that no one moves the ground from beneath your feet.
CHANGE, BEWARE THAT NO ONE MOVES THE GROUND FROM BENEATH YOUR FEET
Change means that what was before wasn't perfect. People want things to be better.
CHANGE, CHANGE MEANS THAT WAS BEFORE WASN'T PERFECT
They must often change, who would be constant in happiness or wisdom.
change, constant, happiness, wisdom
Progress is impossible without change, and those who cannot change their minds cannot change anything.