What is the mark of spiritual maturity? Here I'll attempt to qualify and quantify crudely the same. (This is still a work in progress. I thought it may be helpful in charting spiritual growth. Needless to say--or is it?--this is not a vacuous checklist. Each trait must be an integral part of one's being; i.e., sincere.)

Senior (6σ, relative to global population)

• Sapience of 70.
• Consistent practice of all spiritual disciplines.
• Knows the Bible by heart; of one mind with the living Word.
• Relationship with the Lord blurs the line of individuality between Spirit and spirit.

Adult (5σ)

• Sapience of at least 60.
• Frequent, regular practice of at least 85% of spiritual disciplines.
• Knows the Bible thoroughly; correctly applies Biblical doctrine to all significant moments of life.
• Relationship with the Lord is intimate, akin to Husband and wife.

Adolescent (4σ)

• Sapience of at least 50.
• Regular practice of at least 60% of spiritual disciplines.
• Knows all the Bible narratives; strives to live according to Biblical doctrine.
• Relationship with the Lord is akin to family, like child and Parent.

Child (3σ)

• Sapience of at least 40.
• Occasional or irregular practice of at least 35% and regular practice of at least 20% of spiritual disciplines.
• Actively reads and studies the Bible, learning its doctrines, applying them diligently if haphazardly.
• Relationship with the Lord is akin to a growing friendship, familiar and comfortable.

Toddler (2σ)

• Sapience of at least 30.
• Regular or irregular practice of at least 20% of spiritual disciplines.
• Occasionally reads portions of the Bible and/or attends Bible classes, but lasting application is only coincident with great conviction.
• Relationship with the Lord is comfortable even if only occasionally personal.

Infant

• Sapience below 30.
• Regular or irregular practice of 20% or fewer of spiritual disciplines.
• Knows the major Bible stories, but has little intuitive understanding in applying the Word.
• Relationship with the Lord is one primarily of gratitude--having been rescued from sin--or neediness, having learned He meets needs.

Spiritually Dead

• No relationship with the Lord.