This. . . I suggest that having a good beginning and ending can improve your composition a lot more than using famous quotes and aphorisms.

The teacher is very tired from correcting papers and doesn’t have much time to read your essential sentences. The beginning is concise and the argument is introduced, and the end is short and concise in stating the point of view. Basically, it is an average score. You have to use famous aphorisms either as the beginning or as the final sentence, which can add a lot of color; but they can be piled up and add unnecessary fuss.