What are the Calvinist beliefs regarding sin and salvation?

Calvinists believe in the concept of total depravity, which means that all humans are born sinful and unable to choose God on their own. They also believe in unconditional election, meaning that God chooses who will be saved without regard to any merit or action on the part of the individual. Calvinists also believe in limited atonement, which means that Jesus' sacrifice on the cross was only for the elect. Finally, they believe in the perseverance of the saints, meaning that those who are truly saved will continue in faith until the end.