cruvcio:

By Gryffindor, the bravest were prized far beyond the rest; For Ravenclaw, the cleverest would always be the best; For Hufflepuff, hard workers were most worthy of admission; And power-hungry Slytherin loved those of great ambition. The Houses that, like pillars four, had once held up our school, now turned upon each other and, divided, sought to rule.