The retraction rate of published papers has increased recently. Scientific papers are retracted for many reasons including misconducts or honest errors. The recent rise in retractions is partly due to the growing awareness of research misconduct in scientific communities. This has led the journals to make a greater effort to police scientific and publication misconducts. The availability of tools for detecting text similarities such as Cross-Check made it easier to detect possible text plagiarism. Case studies in plagiarism, however, revealed that some scientific researchers had not been fully aware that copying words and/or sentences from other papers may constitute a serious misconduct. They misunderstood that, as far as they performed their own research and collected novel data, some of the texts might as well be borrowed from other papers. In this session, I will emphasize the importance of using one's own expressions in writing a science paper. A paper has to report authors' original work in their own words. Other people's data and their words can only be utilized when they are explicitly and appropriately mentioned. The proper ways for citing and paraphrasing other people's work will be discussed. It is crucial to understand that the results of a research cannot be accepted as objective scientific knowledge unless it is performed and reported in an ethical manner. Ignorance is not an excuse.