The influence of Galenic and Aristotelian ideas can be seen in many sex manuals and midwifery books from the period, including those that had a direct impact on "Aristotle’s Masterpiece". For example, Levinus Lemnius’ text "The Secret Miracles of Nature" (first published in 1551) states that “a woman’s mind is not so strong as a man’s, nor is she so full of understanding and reason and judgement, and upon every small occasion she casts off the bridle of reason." Similar ideas can be found in the works of women writers as well. One example is Jane Sharpe's 1671 "Midwives Book" – the only book on midwifery to be published by a woman before the start of the eighteenth century. Sharpe writes that  “a woman is not so perfect as a man, because her heat is weaker, but the man can do nothing without the woman to beget children." Yet Sharpe’s book also reflected more contemporary ideas, such as her argument that “shame an impediment to gaining the knowledge that [aids women in leading healthy reproductive lives.”