童年的无知可爱，少年的无知可笑；青年的无知可怜；中年的无知可叹，老年的无知可悲。

No one likes to feel that he or she is being sold something or told to do a thing. We much prefer to feel that we are buying of our own accord(自愿) or acting on our own ideas. We like to be consulted(咨询) about our wishes, our wants, our thoughts.