On the one hand There is no doubt that confidence plays an important role in people's life.When you meet some challenges,you are supposed to be couraged and confident.Nomatter how them difficult.You must tell yourself you can do them well.Then you should try your best to do them.Finally,you will find it easy and you have finished it successfully.You will have an accomplishment and you will be more confident than before. On the other hand,when you see your good friends or classmates have no confidence in something,you should encourage them to do it.Tell them even if they may not be successfull,but they can have a try,this is the biggest success!