So, which comes first according to Catholic teaching… repentance or faith?
In Mark 1:15, he tells us that when we come face to face with Jesus two things are required, repentance or conversion and faith understood as a following of Jesus, discipleship. Our response to Jesus means repenting and following.
The process of repenting, following and believing is woven throughout the New Testament:
The first step is from God, who takes the initiative. For instance, Jesus calls two sets of brothers to leave everything and follow Him: Peter and Andrew, James and John. Jonah is sent by God to the people of Nineveh to invite them to repent. The second step is a human response; this response can only be freely given and results in a radical change. These two sets of brothers freely leave their family and occupation; they freely take up a new and radical way of living. The people of Nineveh freely put on sackcloth, the sign of repentance, and change their way of living. In the third step, both the first disciples and the Ninevites began to follow the Lord; their repenting led to their believing, which implied their following.
Repenting and believing is the basic rhythm of our entire Christian life. Repenting is not a one-time event. Everyday calls us to repent, to turn more to the Lord and believe, to follow him with the totality of our being.
When we honestly repent and turn back to the Lord in conversion of mind, heart and will, when we truly believe in Jesus as God’s only Son who became man and faithfully follow Him, although admittedly not perfectly, we begin to experience an inner peace, a closer union with the Lord.
Catholics know that we must continue to ask ourselves: Do we hear God’s call to repent and believe? Will we follow Jesus and pattern our lives after His? In order to grow closer to the Lord, we must ask Him to help us repent, to turn back to Him and to follow Him more closely
every day. Because we are human, we must always be vigilant and say “yes” to Jesus and “no” to sin. That “yes” of faith needs to be affirmed daily until the end. There is no such thing as “once saved, always saved.”