Sola gratia is one of the five solas propounded to summarise the Reformers' basic beliefs during the Protestant Reformation; it is a Latin term meaning grace alone. The emphasis was in contradistinction to the teaching of the Roman Catholic Church of the day. Catholic doctrine, as defined by the Council of Trent, holds that salvation is made possible only by grace; the faith and works of men are secondary means that have their origins in and are sustained by grace.
During the Reformation, Protestant leaders and theologians generally believed the Roman Catholic view of the means of salvation to be a mixture of reliance upon the grace of God, and confidence in the merits of one's own works performed in love, pejoratively called Legalism. The Reformers posited that salvation is entirely comprehended in God's gifts (that is, God's act of free grace), dispensed by the Holy Spirit according to the redemptive work of Jesus Christ alone.
Thoughts...