Liberty is one of man's birth-rights but liberty does not descend upon man automatically. It is gained by hard work and struggle. Much wealth and many lives may be lost in the process. But it is more difficult to maintain and preserve liberty than achieve it. There are enemies seen and hidden always working against liberty. In case Of a newly liberated country enemies not only work outside the frontiers but they work from inside the country also, which is more dangerous because it is difficult to identify the internal enemies. Here comes the question of vigilance for the retention of liberty. Again, the most important thing to remember is that nothing can be achieved once for all. So a victory is a victory for a short time. The struggle continues. Some people do not realize this and think that after a victory they can take rest. At that time hidden attack may fall upon them. So freedom of a man or a nation should be safeguarded carefully. Lack of vigilance for a long time may spoil everything. Only who those are ever alert can enjoy the benefits of liberty.