Gryffindors are known for their courage and bravery. They step into the unknown because they fear failure more than the obstacles in front of them. They know that nothing is accomplished by remaining idle. Thus, their motto is "Fortitudo prodo laurus" meaning "Courage brings success!"
Hufflepuffs are known for their friendship and loyalty. They accept others no matter what problems they have or burdens they may bear. They are true, and they know that everyone appreciates feeling accepted. Their motto is "Amicitia concero omnis" which means "Friendship connects us all."
Ravenclaws are known for their intelligence and their wit. Their strength is in analytical reasoning. They know that using their minds will get them further in their endeavors than brute force. Their motto is "Mens dominatus potentia" which means "Minds rule might."
Slytherins crave power and domination. They consider themselves superior, and many times this is quite true. They use any means at their disposal to increase their odds of winning and becoming victorious. Their motto is "Potentia par vis" meaning "Power is our strength!"