Your childhood came and went, but unfortunately, even though you are now an adult, you still find yourself behaving–from time to time–as if you were still inexperienced in the ways of life. Or, to paraphrase the Bible, when you were a child you talked like a child, thought like a child, and reasoned like a child…and now you are still talking, thinking and reasoning like that youthful version of yourself.

Women can sometimes be their own worse enemy when it comes to achieving career success. That’s a controversial message in light of the fact that gender and racial discrimination does still occur in the workforce, but that message is the basic premise of Facebook COO’s Sheryl Sandberg’s new book “Lean In: Women, Work, And The Will To Lead,” a sort-of feminist primer on how to get ahead in the world of work.