If you are open-minded and ready to learn, there are many things which you can learn not only from books and instructors but from the very life experience itself.
The preservation of peace and the guaranteeing of man's basic freedoms and rights require courage and eternal vigilance: courage to speak and act - and if necessary, to suffer and die - for truth and justice; eternal vigilance, that the least transgression of international morality shall not go undetected and unremedied.