Sola fide, also known as the doctrine of justification by faith alone.
The doctrine of sola fide or 'by faith alone' asserts God's pardon for guilty sinners is granted to and received through faith alone, excluding all 'works'.
All mankind, it is asserted, is fallen and sinful, under the curse of God, and incapable of saving itself from God's wrath and curse. But God, on the basis of the life, death, and resurrection of his Son, Jesus Christ alone (solus Christus), grants sinners judicial pardon, or justification, which is received solely through faith. The big difference is that some see faith as been passive, merely receiving Christ and all his benefits, while others believe that faith is active and that genuine faith is accompanied by action.