The MSA Random Text is a program which takes a plain text file, which contains a series of phrases, quotes, lines of text, html tags, etc... and a delimiter (the character(s) which separate each entry) and will randomly choose one of the phrases and display it on your web page. This scripts does require the use of Server Side Includes.
The Readme files at Matt's Script Archive contain detailed installation, configuration and usage instructions that will take you step by step from putting the scripts on your system to using them in your web pages. You should read these through and keep them by you when setting up or installing any MSA script. It is probably not a bad idea to print them out.