Your word I have hidden in my heart, That I might not sin against You. Psalm 119:11
When you check the doctrine of Catholic mystics you realize they didn’t understand the gospel according to the Bible (salvation by faith in Jesus sacrifice, not by works, Eph.2:8-9). But they believed their works & sacrifices were needed to ‘ascend‘ & get closer to God. Jesus Christ was not their mediator, but different ‘saints’ that they called patrons or advocates. Most of their doctrines (& even their visions) came from the traditions of the Catholic Church, not the Bible.
Catholics believe in the cleansing fires of purgatory (from Apocrypha book of 2 Maccabees 12 & misinterpretation of 1 Cor.3:15 & 1 Pet 1:7) & believe sin has a double consequence (CCC #1472), which are non-Biblical concepts, but interpretations according to their traditions. In other words they believe Jesus’ sacrifice was NOT sufficient to clean us from sin!