Despair is presumption's antithesis, and it haunted Martin Luther's earlier outlook, fueled by his supercharged scrupulosity, so he invented Sola Fide to keep himself from going batty. In no way, however, am I suggesting that he didn't correctly identify and justly decry some abuses that he observed within the Church.
My young sons, too, are wont to misbehave, but I work to correct them, not to lobotomize them, which is akin to the utterly false sola fide view of salvation.
HAHAHAHAHAHAHAHAHAHAHA!
So, tell me, can a person accept Christ in his heart as Lord and Saviour, then reject Christ, then accept Him again?