rossquote

 ________________________________________
/ "I really believe that if you practice \
| enough you could paint the 'Mona Lisa' |
\ with a two-inch brush." -Bob Ross      /
 ----------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Install

brew install cowsay

Update your ~/.zshrc with the line to execute the program:

sh /path/to/rossquote/rossquote