What key teachings do the texts state clearly?

God is One (Qur'an 112:1). Muhammad ﷺ is His final messenger (Qur'an 33:40). No soul carries another's sin (Qur'an 6:164). Pray, give, fast, make pilgrimage. Do not kill the innocent (Qur'an 5:32). There is no compulsion in religion (Qur'an 2:256). Life is a test, and judgment is real.

That belief should follow evidence; that nature runs on its own laws and needs no divine manager; that religions have human histories and human causes; and that a decent, meaningful life is possible without any god.

Three teachings recur plainly: do not claim certainty you cannot demonstrate (Huxley); it is wrong to believe on insufficient evidence (Clifford); and suspended judgement is an honorable resting place, not a failure (Stephen). Everything else in agnostic writing is argument in service of these.

Love God with all your heart, and your neighbor as yourself (Matthew 22:37–40); Christ died for sins and was raised (1 Corinthians 15:3–4); salvation is God's gift of grace (Ephesians 2:8); forgive as you have been forgiven (Matthew 6:14); and treat others as you would be treated (Matthew 7:12).

That God is one (the Shema); that every human is made in God's image; that Israel must keep the commandments — Sabbath, honest dealing, care for the stranger, the widow, and the poor — and 'love your neighbor as yourself.'

The Four Noble Truths; the Noble Eightfold Path; the three marks of existence (impermanence, suffering, non-self); dependent origination; karma and rebirth; and the Five Precepts for lay life.

That the self (atman) is deathless and is not the body; that action bears fruit across lives (karma and rebirth); that liberation (moksha) is possible; and that life is to be governed by dharma. Famous sentences state it starkly: "You are that" (tat tvam asi), and the Gita's "For the born, death is certain; for the dead, birth is certain."

That God is one (Ik Onkar); that one divine light dwells in every person, so all are equal; that liberation comes through remembering the Name, by grace; and that honest work and sharing outrank ritual, pilgrimage, and asceticism.

That the state may neither establish a religion nor prevent its free exercise (First Amendment); that the republic ensures freedom of conscience but neither recognizes nor funds any religion (French law of 1905, articles 1–2); and that no religious test may ever be required for public office (US Constitution, article VI).

Manifesto III states six affirmations plainly: knowledge comes from observation and reason; humans are the product of unguided evolution; ethical values derive from human need and interest as tested by experience; life’s fulfillment lies in serving humane ideals; humans are social by nature; and working for society’s good serves individual happiness.

That people are born free and equal and government rests on consent (Locke); that power may be used against a person's will only to prevent harm to others (Mill's harm principle); that each person is an end, never merely a means (Kant); and that each has an equal claim to the most extensive basic liberties (Rawls).

That women are full rational persons entitled to the same rights; that separate 'spheres' rest on custom, not nature; that private life is a place of justice — 'the personal is political'; and that injustices of sex, race, and class intersect.

That humanity is naturally made of nations; that each nation deserves self-government; that individuals owe loyalty and service to their own; and that a nation's language and culture are worth preserving. Mill stated plainly that free institutions are next to impossible in a country of several nationalities.