Resources
Sources worth trusting, terms worth knowing, and mistakes worth avoiding — the depth layer behind the guides.
- Vatican official documents archive — Primary-source Catholic Church documents, encyclicals, and catechism text, direct from the Holy See
- Orthodox Church in America — official teaching resources — Orthodox teaching and liturgical resources from a canonical Orthodox jurisdiction
- Pew Research Center — Religion — Independent, non-commercial survey data on Christian belief, practice, and denominational demographics
- Society of Biblical Literature — The main scholarly society for academic biblical studies, useful for balanced, non-devotional scholarship
This site describes what Catholic, Orthodox, and Protestant traditions each teach and names which is which; it is not affiliated with any denomination and does not tell you which one is correct.
The Christian Liturgical Calendar (Observed Differently by Tradition)
Timing and emphasis vary by tradition — Orthodox Easter, for instance, often falls on a different date than Western Easter due to differing calendars.
| When | What happens |
|---|---|
| Advent, four Sundays before Christmas | A season of preparation before Christmas, observed with varying formality across Catholic, Orthodox, and Protestant traditions |
| Christmas, December 25 (Western) or January 7 (many Orthodox, using the older Julian calendar) | The celebration of Christ's birth; the date difference reflects calendar systems, not a doctrinal disagreement |
| Lent, 40 days before Easter | A season of fasting, prayer, and reflection leading to Easter, observed with the most structure in Catholic and Orthodox tradition |
| Holy Week and Easter | The commemoration of Christ's death (Good Friday) and resurrection (Easter Sunday), the central feast of the Christian year across every tradition |
Always confirm current dates with the official source — they move.
Checklists you can work through
Before you visit a church for the first time
- Check the service time and roughly how long it runs
- Look up the denomination's basic teaching, if you don't already know it
- Decide in advance how you'll handle communion if you're not sure you're eligible to take it
- Plan to arrive five to ten minutes early
- Dress comfortably — casual is accepted at most churches today
- Bring no expectation of being asked to speak or participate beyond sitting and listening
Starting a first Bible reading plan
- Choose one readable translation (NIV or NLT are reasonable starting points) and stick with it for now
- Start with Mark's Gospel, not Genesis 1
- Set a small, sustainable daily or near-daily amount rather than an ambitious one
- Keep a simple note of anything confusing, to revisit rather than get stuck on
- Read the passage before reading any footnote or commentary on it
- Expect some passages to make more sense later, not immediately
Common Mistakes When Learning About Christianity
Treating one tradition's answer as "what Christians believe"
Ask which tradition, specifically — Catholic, Orthodox, or which Protestant stream — before treating an answer as universal.
Assuming denomination name predicts every local church's practice exactly
Read the specific congregation's own statement of belief; practice can vary within a denomination, especially in traditions that grant congregations autonomy.
Quoting a Bible verse without naming the translation
Note which translation you're reading, since word choice sometimes changes what a passage appears to argue.
Confusing a claim's date with its truth
That a teaching developed centuries after the New Testament doesn't automatically make it wrong, and that a teaching is old doesn't automatically make it right — evaluate the argument, not just the age.
Assuming disagreement between traditions means the core faith is unclear
Separate the shared creedal core, which is broadly agreed, from the areas of real, longstanding disagreement — the guide on what Christians actually agree on covers the distinction.
Reading a study Bible's footnote as neutral fact
Footnotes reflect the editors' tradition; read the text first, then treat the footnote as one interpretation among others.
Glossary
The words that get used as if everyone already knows them.
Trinity
The doctrine that God exists eternally as three persons — Father, Son, and Holy Spirit — one God, not three. Defined Christian doctrine across Catholic, Orthodox, and the large majority of Protestant traditions.
Incarnation
The Christian claim that God the Son took on full human nature in Jesus Christ, becoming fully human while remaining fully divine.
Nicene Creed
A statement of core Christian belief formalized at the councils of Nicaea (325 AD) and Constantinople (381 AD), still recited in Catholic, Orthodox, and many Protestant services today.
Sacrament
A rite considered to convey God's grace in a specific, tangible way. Catholic and Orthodox tradition recognize seven; most Protestant traditions recognize two (baptism and communion) as instituted directly by Christ in Scripture.
Sola scriptura
Latin for "Scripture alone" — the Reformation-era Protestant principle that Scripture, not Church tradition or papal authority, is the final authority for Christian belief and practice.
Eucharist / Communion / The Lord's Supper
The rite involving bread and wine, tracing to Jesus's Last Supper, understood differently across traditions — from a literal transformation into Christ's body and blood (Catholic) to a symbolic act of remembrance (many Protestant traditions).
Great Schism (1054)
The formal split between the Western (Catholic) and Eastern (Orthodox) churches, driven primarily by disputes over papal authority and the filioque clause.
The Reformation (from 1517)
The movement, beginning with Martin Luther, that produced Protestant Christianity as a break from the Catholic Church, centered on the authority of Scripture and salvation by faith.
Filioque
Latin for "and the Son" — a phrase added to the Nicene Creed in the Western church, concerning whether the Holy Spirit proceeds from the Father alone or from the Father and Son together. A live point of disagreement between Catholic and Orthodox tradition.
Denomination
A distinct, organized branch or grouping within Christianity, such as Catholic, Eastern Orthodox, Lutheran, Baptist, or Methodist.
Canon (of Scripture)
The official, recognized list of books included in the Bible. Catholic and Orthodox Bibles include additional Old Testament books beyond the Protestant canon.
Orthodoxy (historic Christian)
Adherence to the core doctrines affirmed by the early Church councils, particularly the Trinity and the nature of Christ, as distinct from groups that reject those core claims while using Christian vocabulary.