Are the twelve spiritual disciplines biblically sound? I was reading about Renovaré and came across the "twelve spiritual disciplines": meditation, prayer, fasting, study, simplicity, solitude, submission, service, confession, worship, guidance, and celebration

My first thought is that the list almost sounds contrived (being exactly 12).  However, when I look at each one, I can see how each of these things might be able to help us grow spiritually.

Is this list found in the Bible somewhere or was a contrived list?  Is this the only twelve items that can help you grow (or even the "top twelve")?

Are there any one of the twelve items that may be contentious or can they all truly be ways to grow in faith?

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The twelve items you mention are not found as a list anywhere in the Bible. However that does not mean they are contrived. They are, I believe, very ancient and proven over a long period. I don't believe that they were ever intended to be an exhaustive list.

Each of the disciplines can be justified with biblical references, and they are definitely "biblically sound". I can provide references if necessary, but the Renovare site you link to, or Richard Foster's book, will give a foundation much better than I could.