Plagiarism, as defined in the 1995 Random House Compact Unabridged Dictionary, is the "use or close imitation of the language and thoughts of another author and the representation of them as one's own original work."
The writers copy the original source directly and paste it in their works.
The writers think that they can bypass the plagiarism detection by altering the order of the words in sentences or the order of sentences in paragraphs.
The writers copy multiple original sources and try to 'diversify' the risk of copying a single source.
The students in schools copy previous students' works. This is common for higher form student to lend out their works to lower form student to copy.
Some writers copy the sources without citing the sources in their works.
「誠者,天之道也;思誠者,人之道也。」
《孟子·離婁上》第十二章
「天行健,君子以自強不息;地勢坤,君子以厚德載物。」
《易經》《周易》
"It is curious - curious that physical courage should be so common in the world, and moral courage so rare."
Mark Twain (1835-1910)
"Have the courage to say no. Have the courage to face the truth. Do the right thing because it is right. These are the magic keys to living your life with integrity."
W. Clement Stone (1902-2002)
"Relativity applies to physics, not ethics."
Albert Einstein (1879-1955)
"Integrity without knowledge is weak and useless, and knowledge without integrity is dangerous and dreadful."
Samuel Johnson (1709-1784)
"Nothing is at last sacred but the integrity of your own mind."
Ralph Waldo Emerson (1803-1882)
「夫君子之行,靜以養身,儉以養德,非淡泊無以明志,非寧靜無以致遠。」
《诸葛亮集》