Certainly, every person has bad habits. Somepeople may be in the habit of speaking rudely; some tend to be deaf to others' opinions; some areinclined to delay. However, there is no doubt thatallowing to be controlled by bad habits does a greatharm to personal development.
It is not too much to say that it is a destructivebehavior to allow to be controlled by bad habits while it is constructive to change unwantedhabits. If bad habits are allowed to be developed, they will get out of control and become bigobstacles to life or career. For example, a delayed-prone person will hardly restrain himselffrom missing the deadline. Understandably, he will have few chances to be entrusted withimportant tasks and then will barely be professionally experienced enough to gainpromotion. On the contrary, it is beneficial to change unwanted habits and acquire goodones, because good habits can make people more competent and thus widen the door tosuccess.
In summary, bad habits will probably make it impossible for us to achieve ourambitions. Therefore, we should be alert to our bad habits and make persistent efforts tobreak them.