Quotations, or quotes for short, are statements written or spoken, that are repeated by others to make a point. The point may be to show what a certain person believes about something. They may be referred to in speeches or print as words of wisdom. Many popular quotes are humorous or witty.
There are a number of good sources of quotations. You can use a book that contains a large collection and find the topics you're interested in by using the index. There are some good sites on the Internet where topics can be found by using a keyword in a search field.
The source you use will tell you who said or wrote the words. It will usually also show you how to find other quotations from the same individual.