The foolish and the dead never change their opinions. James Russell Lowell
If you never change your mind, why have one? Edward de Bono
You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete. Buckminster Fuller
So sweet love seemed that April morn, When first we kissed beside the thorn, So strangely sweet, it was not strange We thought that love could never change. Robert Bridges
No matter how long a stick may stay in a river, it will never change into fish. African Proverb
A chameleon can only change its colour but never change its skin. African Proverb