change, better, always
You are always free to change your mind and choose a different future, or a different past.
Change your opinions, keep to your principles change your leaves, keep intact your roots.
They must often change, who would be constant in happiness or wisdom.
CHANGE, CONSTANT IN HAPPINESS OR WISDOM
Change means that what was before wasn't perfect. People want things to be better.
CHANGE, CHANGE MEANS THAT WAS BEFORE WASN'T PERFECT
One must change one's tactics every ten years if one wishes to maintain one's superiority.
one must change, tactics, ten years, wishes, maintain