Because scholarly research articles are on a specific study or experiment, they are often categorized into subject-specific databases. Searching these databases can be the best way to find relevant sources because you are only searching articles that fit into that category (unlike searching Google, which looks at all content on the internet)!
Depending on the quote and topic you chose, one of these databases may be your best bet! If you're not sure what subject your topic falls under, try using a multidisciplinary database or RVOneSearch, which searches many databases at once. This is still better than searching Google, because you are focusing on academic resources instead of who-knows-what you'll find on the internet!
These and more databases can be found on the Library's databases page (which you can also get to from the Library homepage).