Principled often manifests itself in the details - for example, many people refuse on principle to pay bribes, regardless of their size, bring gifts to superiors for career advancement, etc. etc. Man can not renounce their beliefs in the event that it is true, correct beliefs. Such principles should be recognized and supported.
But there is a silly principle, has nothing to do with high ideals. Quarreled two friends, with none of the principle does not want to go first to be reconciled. The result can be a complete rupture of relations. Another option - a man does something, he suggests that he does not quite correctly, that it is better to do it differently. What to do in this case? Indeed, often the person is aware that the council stands. Manifests itself here and no one wants, harmful integrity - even knowing that he is wrong, people will come in spite of all their own way. At the heart of this is the pride of principle, one of the most grievous sins.
There are situations where even seemingly correct principles can work for evil as the man himself and others. A good illustration of this is the story of a monk who always tell the truth. Once he saw the fleeing robbers forest people hid in a cave, the entrance to which hid the dense bush. Robbers came to the rescue of the monk asked what happened to the fugitives. True to his principles, he meekly have to enter the cave. In this situation, the monk went wrong, because for the sake of compliance with a principle violated far more important - the need to provide good and justice.
So should there be a principal? Yes, if your beliefs are correct, do not bring harm to others. In this case, try not to show their integrity - let your decisions and actions will be correct, but calm, getting rid of theatricality. This is where they will get the most weight.