We live in a century in which everything happens rapidly and many people have the desire to succeed over a night . There is a assertion that success in any realm of  life comes more often from taking chances or risks than from careful and cautious planning . I aprove with the assertion partly -it can not be ignored that chances and risks play an important role in success , while the same important is careful and cautious planning .
 
In the case of Bill Gate's success , chances and risks play an necessary role .Without courage to drop out from Harvard , he may not became the richest person in the world now . Apart from his courage , Gate should own much of his success to his careful and cautious planning in work . During the time he left Harvard , he kept learning mathematic and computer knowledges . In addition , he and his friend Paul Ellen would discuss new ideas of future projects and the possibility of starting a business one fine day . After careful preparation and planning, he formed Microsoft -one of the most famous computer technologh company today . Therefore , in Gate's success , both risks and planning playing an indispensable role .
 
The discovery in science is sometimely caused by accident factors as well . Kakular ,a famous German chemist , once had a dream in which  a snake bite its own tail . The dream inspired Kakular came up with the idea how Carbon atoms  arranged in a benzene which have troubled him for a long time . Kakular attributed his discovery of the structure of benzene to his dream . Nevertheless , without his long time reasearch in chemistry and his insistance , he could not have found the right structure of benzene . Sometimes , people have made effort for a long time , and all they need is a opportunity to express their ideas . When the opportunity comes , they just catch it in time and get succeed . Some times people just see the opportunity which makes their success possible , while the ignored the long period of preparation for the success .
 
Pure risks and chances can not bring success . A famous fable in China has pointed out this clearly  .It is said that a farmer seen a rabbit hit an tree and died one day . After that he waited beside the tree hoping more rabbits would hit the tree and he can get them without labor . Nevertheless no rabbit has ever hit the tree and the farmer wasted several year with nothing in turn . Without hard effort to prepare and plan for an success , one can not catch the opportunity which can lead to their success and they will never get succeed even they are offered several opportunities in their life .
 
In conclusion , careful and cautious planning play the same important role as risks in success . People should never overemphasize any of it . The secrect of success is simple :keep making effort and make a specific planning of getting success ,and  when the opportunity comes , just catch it and make your dream come true .