Book of Kells, Chi Rho folio, c. 800 · public domain

Christianity

Tradition·Founded 30 CE·est. ~2.4 billion worldwide

Judaism → Christianity → 11 branches

Branch

How to Live

the ethic — what it asks of a life
Love God, love your neighbour. Asked which command is greatest, Jesus gives two and refuses to separate them. Both are quotations from the Hebrew Bible, which the tradition tends to forget when it treats them as new. Go deeper — context & 1 source →
The Ten Commandments. Inherited whole from Sinai — the shared moral floor of the Abrahamic house. Go deeper — context →
The Golden Rule. Stated positively — do to others — where most earlier versions state it negatively, as a prohibition. The difference is doing something rather than refraining, and the tradition has always known that is the harder half. Go deeper — context →
Love your enemies. The Sermon on the Mount's impossible standard — forgiveness as command, not counsel. Go deeper — context & 1 source →
Whatever you did to the least of these. The judgment scene in Matthew 25 sorts people by six practical acts — food, drink, welcome, clothing, care, visiting the prisoner — and neither group knew what it had been doing at the time. Doctrine is not mentioned. Go deeper — context & 1 source →
The Beatitudes. Blessed are the poor in spirit, the mourners, the meek, the merciful, the peacemakers — the Sermon on the Mount's inverted honors list, read as the kingdom's constitution. Go deeper — context & 1 source →
The seven deadly sins. Not in the Bible. Evagrius listed eight thoughts that trouble desert monks, Gregory the Great cut them to seven, and they became the standard examination of conscience for a thousand years. Pride is first because it is the one that survives the correction of the others. held by most Go deeper — context →
Forgive — seventy times seven. Peter proposed seven times as generous; the answer multiplied it past counting. Forgiveness in this code is not a feeling but a practice with no expiry. Go deeper — context & 1 source →
The works of mercy. Seven for the body, seven for the soul. The bodily list is lifted straight from Matthew 25 with burying the dead added — which the plague centuries made the most costly and the most necessary of the seven. held by most Go deeper — context →
Marriage, and what the churches ask of it. The common ground is fidelity; almost nothing past that is common. Rome forbids remarriage after divorce without annulment and forbids contraception, the Orthodox permit a second marriage with a penitential rite, and Western Protestant churches are currently splitting over same-sex marriage rather than agreeing about it. ⚖ contested within Go deeper — context →
Let your yes be yes. A ban on oath-taking, read literally by Quakers and Anabaptists and figuratively by nearly everyone else. English Quakers went to prison rather than swear in court, and the affirmation now available in most common-law countries exists because they kept refusing. Go deeper — context & 1 source →
The tithe. Ten percent, taught as an obligation in most Pentecostal and evangelical churches and as an aspiration elsewhere. It funds a global network of churches with no state support, and it is also the mechanism prosperity preaching uses, which is why the practice is defended and attacked from inside the same tradition. ⚖ contested within Go deeper — context →
Turn the other cheek — and the argument about war. The historic peace churches read the Sermon on the Mount as forbidding violence outright and have paid for that reading in every conscription since. The rest of the tradition uses just war doctrine, which permits force under conditions it then finds ways to satisfy. Both sides quote the same chapter. ⚖ contested within Go deeper — context & 1 source →
Sabbath, moved to Sunday. The fourth commandment kept on the first day rather than the seventh — a substitution made early and never fully argued for, which Seventh-day Adventists reject and keep Saturday instead. Sunday trading laws held in much of the West until the 1990s and then went, quietly. held by most Go deeper — context →
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