What is Calvinism and what do Calvinists believe?
That’s a difficult question because “Calvinism” can range from Baptists who only hold to the Five Points of Calvinism (TULIP) to those who are hyper-dedicated to his teaching. To cover TULIP, though, it teaches:
- Total Depravity - Humans aren’t so much corrupted as depraved. Due to this, the human will cannot choose God.
- Unconditional Election - God has chosen some to salvation based on His decision alone and irrespective on them meeting some “condition”. This often includes the idea of “double predestination”, in which God also predestines some for hell, but some modern Calvinists are trying to distance themselves from this teaching.
- Limited Atonement - Jesus only died for the elect from #2. Some modern Calvinists are moving in the direction of “Limited Intent”, meaning that Jesus died for all, but the efficaciousness of it was only intended for the elect.
- Irresistible Grace - God’s efficacious grace is irresistible. The human will will always respond positively to it. However, as per #2, He only grants this to the elect.
- Perseverance of the Saints - Those who have encountered God’s efficacious grace can never fall out of His grace, even if they enter a temporary life of debauchery. In general, though, the elect are guaranteed to be saved in the end.
Catholicism isn’t entirely opposed to #2, assuming that it doesn’t come with double predestination, nor is it opposed to #3 if under the Limited Intent context. It would be opposed to the other three points, and it is often opposed to Calvinism’s take on the two points where there might be agreement.
However, if we look beyond TULIP, Calvinism is also notable for Covenant Theology, which drives a lot of its historical and Scriptural understanding and is at the core of some of its teachings, like embrace of infant baptism. Baptist variants often have their own unique view of Covenant Theology that doesn’t permit infant baptism.
Calvin also had his own version of the Real Presence. Jesus wasn’t so much physically present as spiritually present. Grace is also conferred in the Lord’s Supper, and it is one of two sacraments in Calvinism along with Baptism.
These are at least the “big issues” that Calvinists often bring up. Around the time I left Presbyterianism, I know that there was some ongoing discussion about Mary’s title “Mother of God”, “Union with Christ”, and whether or not Christ is eternally subordinate (or eternally submissive as some put it) to the Father. From what I remember, most were OK with calling Mary as “Mother of God” and were interested in what “Union with Christ” meant and Calvin’s comment on “quasi-deification”. The last point of discussion was much more heavily debated and even caused a bit of trouble for the ESV when it was decided the “final” version would take a side in its translation of a key passage to the debate.