The Puritans were convinced that the ability to think clearly was of the utmost importance whether a man was studying for the ministry or any other of the sciences. In their minds, if a man could not think clearly, he could not interpret the Bible correctly. This work on logic and reason by Isaac Watts (known primarily for his genius as a writer of hymns, but unfortunately unknown for his skills as a theologian) was a standard textbook for nearly 200 years.
In our day, common sense is not very common and clear thinking is not very clear. This book will help discipline the mind and train the reader to discern proper thinking and argumentation in seeking truth.