" For this reason, Christ had to live a life of perfect obedience to God in order to earn righteousness for us. He had to obey the law for his whole life on our behalf so that the positive merits of his perfect obedience would be counted for us. Sometimes this is called Christ’s “active obedience,” while his suffering and dying for our sins is called his “passive obedience.”3 "

― Wayne Grudem , Systematic Theology: An Introduction to Biblical Doctrine