failure proves that people don’t want to do this strongly enough. Each person willing to get high results and weak desire can’t be cause of failure.Owing to lack of experience and not trying hard enough,I disapprove of this opinion. Firstly,people don’t usually be successful due to having little experience .Moreover,it is difficult to do first without any knowledge. Secondly, not trying hard causes to come across failures. Most scientists weren’t able to do their inventions at first time yet they didn’t give up and tried all methods. Consequently, they achieved success. In conclusion, humans can be successful because of that they try hard and do with knowing all information about their work.