Be open to learning because no matter how much you know, there are still so much more to be learnt.
Do not live a rigid and stagnant life when you are supposed to be learning. You do not have to fight new things contrary to what you know previously. You do not have to hold on to your old ways and resist every new thing.
The world is too complex for any one individual to have an absolute knowledge of the happenings here. Learning should be a continuous process until we leave this earth.