This question was inspired by the following comment by Johanna on another question:
I just had to say: including the idea "I believe I was born for scientific research" is a terrible idea. Did no one tell you to avoid cliches? Try to change that to "I have done / am doing X, Y and Z, all of which demonstrate an aptitude and passion for scientific research" instead.
Here is my paragraph, which Johanna is commenting on:
I believe that I was born for scientific research. I had my first experience in research when I was in high school. Although my interest are natural sciences, my first research was in social science. For a long time ago, I had always queried about why when Vietnamese people in love, the female one always addressed herself (and was addressed) as the little sister, and the male one always addressed himself (and was addressed) as the older brother, while in fact there were many couples which the female had the same or larger age than the male. I couldn’t understand this convention because the couples had to change the way they address each other, and from my (naively) feminism point of view, this was unacceptable. In the research, I had proposed a hypothesis to explain this, and even when I broaden my objective to homosexual couples, this hypothesis still worked. This is a biggest proud of all my scientific activities so far.
Johanna's advice seems inconsistent with ff524's answer to my question about withholding information in my application.
Is putting the statement/conclusion at the beginning of a statement of purpose considered a cliché?