Calvinists have their own doctrine of prevenient grace, which they identify with the act of regeneration and which is immediately and necessarily followed by faith. Because of the necessity of salvation following this dispensation of prevenient grace, it is called irresistible grace. Wesleyan prevenient grace also contrasts with the Calvinist understanding of common grace by which God shows general mercy to everyone (), restrains sin, and gives humankind a knowledge of God and of their sinfulness and need of rescue from sin. Common grace is thus said to leave people without excuse. Arminians object that Calvinist common grace leaves people absolutely incapable of coming to God (a point on which Calvinists agree) and thus do not believe it leaves them without excuse.