Here is a theological definition: A Theological movement of the 16th century with extensive cultural implications, that is often summarized by five tenants known as the “five solas”, namely: Scripture alone as a higher authority than church councils and popes, salvation by Grace alone, received by faith alone, in the atonement of Christ alone, for the glory of God alone. These five “solas” were in opposition to Roman Catholic teachings of faith plus meritorious works. Other points of contention were the existence of Purgatory, relics for merit, praying to saints, worship of Mary, infallibility of popes, and the nature of the real presence of Christ in the Eucharist.
Is this sourced or is it your opinion?
DaveyB - Truth is confusing to Catholics. The 5 Solas stand in opposition to their self-serving church traditions and, therefore, are painful to the deluded.