The sentece is TRUE.
To begin with lets define quote: it is a phrase or small piece of writing taken from a longer work of literature, poetry, etc. or what someone else has said.
Remember that it doesn't matter which subject you want to address, there is going to be a group of people that are experts or have already worked on it beferore you did. By using quotes you can add more meaning to your content because that previous knowledge is captured in a simpler and clearier way. Using quotes gives you social proof to support your claims, in other words, the information given will be more credible. They can also be used to inspire your audience and convince it to follow your ideas or to make a short summary of your claims.