'Many people are their own enemies and do precisely those things that are bad for their health.' Discuss.

People develop different styles and habits, many of which are health-impairing. Many people are their own enemies and do precisely those things that are bad for their health. Some people drink heavily, even when they know that it is damaging their liver.

• Smoking is another health impairing habit. It is found that lung cancer and heart disease kill the largest number of smokers.

• Alcohol and drug abuse are very common health-impairing habits.

• The addiction to alcohol and narcotics damage the liver, respiratory system, intestine and can cause neurological and infectious diseases as secondary complication.

• Many of these drugs can also damage one's ability to think logically and coherently.

• Most of the people who engage in such harmful habits have a tendency to underestimate the risk of damaging their health.

• The modern life-style has led to violation of many basic principles of health and paid little attention to what do we eat, where do we live and how do we think.