John 20: 30-31 . . . “Many other signs therefore Jesus also performed in the presence of the disciples, which are not written in this book; but these have been written that you may believe that Jesus is the Christ, the Son of God; and that believing you may have life in His name.”

Written with a purpose in mind. written to deceive or to trick? maybe not, but certainly written with a purpose. . . that of convincing others to believe something which they might otherwise pass over and ignore.

Rather like the tricks used by advertisers or politicians.

Written by those who want a lever with which to control the people? It's a long lever, stretching as it does over 2,000 years.