A question regarding 1 John 1:9.?

How can you explain a person who is a believer that they will need to confess their sin whatever they to do wrong. Just like in the Bible, 1 John 1:9. If a person ask you, why do I need to confess all the time? If she/he tell you that I only need to confess one, or she/he think she/he don't need to confess... show more How can you explain a person who is a believer that they will need to confess their sin whatever they to do wrong. Just like in the Bible, 1 John 1:9. If a person ask you, why do I need to confess all the time? If she/he tell you that I only need to confess one, or she/he think she/he don't need to confess his/her sin because God always forgive her/him all the time. How can you explain to that person regarding 1 John 1:9?
Update: Also, How to confess your sins to God as a Christian?
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