Why did people want to become nuns and priest in the middle ages?

Monks and Nuns were important in the middle ages because they taught the priests and helped others in need of spiritual salvation at the church.

Roman Catholic AnswerThe Middle Ages were a time of great faith. People's lives revolved around the Church and they realized that an eternity in heaven was something that should rule these few short years on earth. The monks and nuns kept alive learning, and history; and reproduced many books that we would have lost otherwise. They contributed to advances in science, farming methods, and kept alive many skills that would otherwise have been lost. There were few towns, and no cities in the Middle Ages, and the monasteries served as centers for a host of things. Mendicants came along towards the end, the High Middle Ages, and did a lot towards spreading faith and love of God.