To begin with , it is a widespread agreement that working industriously plays an integral part in our success. As a saying goes: "Practice makes perfect", we all are conscious of the fact that only by training hard can we achieve our goals and be successful in life. This means having to encounter and overcome a large number of intricate problems. Therefore, one has to be really tough and persevering in order to attain great achievements. Moreover, it should always be borne in mind that we will get nothing but a failure if we are always work-shy and afraid of difficulties. 

In addition, although there is no denying the importance of working hard, luck also plays a certain role in our success. By way of illustration, if we have the good fortune to be born and grow up in an affluent family, we may have a great opportunity to study and develop more efficiently, thus leading to a better chance of success in the future. Another typical example is the case of some girls who are lucky to have a gorgeous nature beauty. Thanks to their physical attractiveness, they may easily become famous and lead a prosperous life without having to work too hard. 

Taking everything into account, I contend that both luck and hard work have a positive impact on our success. However, luck does not always come to everyone , so we should rely on ourselves and make every effort to work as hard as possible, since it is the decisive factor that guarantees our success under any circumstances.