As human beings, we have the capacity to think, in the sense that we can, at a purely intellectual level, conceptualize and discriminate between right and wrong, good and bad. Animals, on the other hand, are governed by their instincts. The ability to think and plan a course of action is unique to human beings. Animals have no need to do this and are not liable to err, for their actions are governed by their natural instincts.
Since human beings are endowed with the ability to decide on a course of action (and cannot, in reality, do otherwise), it is necessary for everyone to fully awaken their senses and bend their mental faculties to the right way of thinking. Once we start thinking right, our actions will consequently be right. This article enumerates and explains some of the essentials of right-thinking.