"a teaching..."
Rastafari cannot be reduced to ganja smoker, more than that
ganja smoker often taken as synecdoche for Rastafari,
however, this is "taking the part for the whole"
Rastafarianism Definition Paper
authoritative testimony in the conclusion will amplify the connections you want to make and leave us with,
for example a "primary" or source text
http://www.sacred-texts.com/afr/piby/index.htm