Taken from http://apod.nasa.gov/apod/ap960707.html
While talking about Newton's first law and specifically chastity, it will be unfair to not talk about the life of Sir Isaac Newton the father of calculus. "Especially in the earlier part of his life, Newton was a deeply introverted character and fiercely protective of his privacy"."Whatever the reasons, the fact remains that Newton's defensive secretiveness makes it extremely difficult to form a full and balanced assessment of his character". Newton was deeply religious, and he chose chastity since he never got married or any sexual intercourse had never been reported in his life. "Newton was the most original and influential theorist in the history of science". He knew that to be in constant motion in his scientific work the forces need to be balance, and chastity was the principle Newton chose to not allow any unbalanced forces during his life.