Generally lie has a negative image such as rude attitude for cheating people. In addition, politicians often lie to justify themselves after their frauds. However, where I live, in Japan, as there is a proverb, the end justifies the means, also in Japanese, lie is not neccessarily bad influences on our lives. Personally, I agree with the opinion that it is better not to tell the truth sometimes.
My primary reason is that to avoid shock on mind of people, lie plays a roll keeping peoples' mind right. For example, as the proverb, care killed the cat, exists, the mental state of human is closely related to health of human. Actually, physicians rarely tell his or her patients true symptons in examining in the case of serious diseases found in body of patients, because the confession may cause worse states in body of them. It indicates that lie to patients must be the one of the important proccesses in medical treat. However, without lie to people as a justified way, anxiety accumulates in mind of humen, and it will cause people to have worse states such as deteriorating diseases or melancholy.
Another reason is that lie has an effect on keeping society or order relatively calm. One example of this is that people tend to be distracted with anxiety. The factcrs which can cause anxiety in mind of human are crisises on people such as disaster, warfare and so on. For last several years, tremendous hurricanes have attacked southern part of US. My view is that the disturbed order such as congestions on roads or thefts in cities were caused by anxieties of people for the disaster. Although the balance between prevention from disaster and maintenance of order is difficult, maintenance of order with lie is also important to prevent from crimes confusion. A frank announcement of disaster to people without lie, on the other hand, may cause further bad influences; disturbed order such as theft or congestion on roads.
My primary consideration with respect to how we keep health of human and order of society right, are wether to use lie appropriately or not. Therefore, I want to insist that lie is vital thing in our lives partly, but of course, it depends on the way of its use. I strongly agree with the opinion that it is better not to tell the truth sometimes.