To drive the point home, consider the story of a 2018 bar examinee (who shall remain anonymous). He downloaded a "revised penal code by reyes pdf" from a file-sharing site. The PDF was the 1994 edition (the year Justice Reyes died).
For a law student, having the Revised Penal Code by Reyes PDF is akin to having a senior mentor whispering explanations in your ear during a study session.