you should create your own thesis - ur own theory/idea abt change and try to define it in the intro......this will help u to keep to the topic and build arguments that support your thesis, hence a more specific and targeted essay instead of a general one.
i know this mihgt sound overboard, but in reality, if you really want an outstanding A essay, you need about 2-3 quotes for each point and for each text. For the Section C essay, we are usually looking at 3 texts and assume that u have 3 arguments, that means 3 quotes x 3 arguments x 3 texts = 27 quotes altogether. The quotes dunt have to be long, but you must have them. Furthermore for those who are doing poetry, the number of your quotes should be more because you can't just do one poem, at least 2 poems is substantial.