The mind is the greatest gift God Almighty has bestowed upon man, and it is the basis of accountability. Thinking is the fruit of that gift, which man must utilize to distinguish evil and use it for good. In this compact yet highly beneficial book, the author seeks to guide the reader toward the best methods that lead to sound thinking. He explains that thinking is a tool, like any other tool, that can be right or wrong. The key to this lies in practicing its use, ensuring its safety, and avoiding the pitfalls that may afflict it. He then devotes special attention to the greatest of these pitfalls: whims, which can sweep a person away from the path of sound reason. The author simplifies all of this in a beautiful, fluent language that is accessible to the general reader, even as he discusses some complex and controversial issues, which the skilled translator then translates into fluent, high-quality Arabic.