Old dogs with new tricks?!

They said that you cannot teach old dogs new tricks. Let's put it this way...there are people who are highly resistant to change. There are those who have a little tolerance when it comes to extending our boundaries. We have to be a little confident that sometimes we should adapt ourselves to different conditions, environment, or to any circumstances. But if you think that this will only give you some nips in a way...it will be much better if you stick to your guns and refuse to submit from others.