This book contains simple explanations to some of the most important theorems and identities in mathematics. They are not intended to be rigorous proofs but rather intuitive guides that take the mystery out of some of the most powerful mathematical facts ever discovered. These important facts are often presented to students with no justification. Students are expected to simply memorize them. This book not only presents the facts but also shows why they must be true in a logical way. It is not meant to be used as a textbook but it could be used as supplement to formal coursework or by someone...