4 Noble Truths: suffering, the cause of suffering, the cessation of suffering, the path that leads beyond suffering.
4 Bardos: bardo of this life, bardo of dying, the bardo of luminosity, bardo of becoming.
4 Elements: earth (solid), water (liquid), fire (hot), wind/air (moving).
4 Eyes of the Buddha: physical eye, divine eye, wisdom eye, dharma eye, Buddha eye.
4 Foundations: mindfulness of body, feeling, mind, phenomena.
4 Fruits of the Way: stream enterer, once returner, never returner, arahat.
4 Great Streams of Suffering: birth, sickness, old age, death.
4 Movements: from darkness to darkness, from light to darkness, from darkness to light, from light to light.
4 Types: those who look after themselves and ignore others, those who look after others and ignore themselves, those who neglect themselves as well as others, those who look after themselves as well as others.
4 Hallmarks: all compounded things are impermanent, all emotions are pain; nothing has inherent existance or self-identity, nirvana is beyond concepts.
4 Immeasurables: may all beings know happiness and the causes of happiness (loving kindness). May they be free from suffering and the causes of suffering (compassion). May they never be separate from the highest bliss (sympathetic joy). May they come to rest in the great equanimity free from attachment and aversion (equanimity).
4 Kalpas: the kalpa of creation, the kalpa of continuance, the kalpa of decline, the kalpa of disintegration.
4 Metaphors: thinking of oneself as being sick, a spiritual friend as a doctor, the dharma as the remedy, practicing instructions as the way to recover.
4 Modes of Birth: from the womb, from the egg, from moisture, from transformation of forms.
4 Noble Disciplines: not to respond to anger with anger; not to respond to physical harm with physical harm, not to respond to criticism with criticism, not to respond to verbal argument with verbal argument.
4 Obscurations: negative emotions, karmic obscurations, conceptual obscurations, obscurations of habitual tendencies.
4 Powers: aspiration, steadfastness, joy, moderation.
4 Opponent Powers: regretting harmful action, reliance on the 3 jewels, remedy by applying antidote, resolving not to repeat.
4 Reliances: rely on the teacher’s message, not on his personality, rely on the meaning, not just the words, rely on the real meaning, not on the provisional one, rely on the innate wisdom mind, not on ordinary, judgmental opinion.
4 Reminders: preciousness of human rebirth, the truth of impermanence and death, the law of cause and effect, the shortcomings of samsara.
4 Seals: all composite things are impermanent, all emotions are painful, all phenomena are empty; nirvana is beyond extremes.
4 Teachings of the Buddha: sudden, direct teaching, gradual teaching, secret teaching, indeterminate teaching.
4 Things Necessary for Karma to Ripen: intention, action, object, completion.
4 Ways of Attracting Beings: being generous, speaking in a pleasant manner, teaching in accordance with individual's needs, and acting in accordance with what is being taught.
4 Alternatives: being, non-being, both being and non-being, neither being nor non-being.
4 Mindfulnesses: mindfulness of body, mindfulness of feeling, mindfulness of thoughts, mindfullness of all things.
4 Bodhisattva Actions: giving to others, affectionate speech, conduct profitable to others, cooperation with others.
4 Certainties of a Buddha: perfect enlightenment is irreversible, all defilements are exhausted, all obstacles have been overcome, the way of abandoning has been proclaimed.
4-fold Relationship Between Questioner and Answerer: guest sees host, host sees guest, host sees host, guest sees guest.
4 Great Vows: though the many beings are numberless, I vow to save them, though greed, hatred and ignorancess rise endlessly, I vow to cut them off, though the dharma is vast and fathomless, I vow to understand it, though Buddha's way is beyond attainment, I vow to embody it fully.
4 Illnesses: grasping the body as oneself, grasping the four gross components, grasping the five clusters, grasping the twelve sense media.
4 Jhanas: First Meditation: initial and discoursive thoughts; born of aloofness; rapturous and joyful. Second Meditation: devoid of initial and discoursive thoughts; born of concentration; rapturous and joyful. Third Meditation: dwelling in equanimity, attentiveness and clear consciousness; joy. Fourth Meditation: neither joy nor anguish; purification by equanimity and mindlfulness, without defilements; mind becoming fixed and immovable.
4 Kinds of Samadi: constantly sitting, constantly walking, part walking, part sitting , neither walking nor sitting.
4 Medicines: the two elements of matter and mind, the four gross components, the five clusters, the twelve sense media, the eighteen elements.
4 Phases of Thought: pre-thought (not yet thinking), imminent thought (being about-to-think), the thought proper (actually thinking), completed thought (having thought).
4 Propositions of Nagarjuna: identity, difference, negation, affirmation.
4 Repudiations of the Truth: to assert definitely that things exist, that they do not exist, that they both exist and do not exist, that they neither exist nor do not exist.
4 Right Efforts: discard wrongdoings that have arisen, prevent the arising of unarisen wrongdoings, develop unarisen good actions, augment arisen good actions.
4 Stages of Formlessness: stage of limitlessness of space, stage of limitlessness of consciousness, stage of nothing whatever, stage of beyond awareness and non-awareness.
4 Stages of the Dharma: the opening up of the Enlightened One's wisdom, the revelation of the Enlightened One's wisdom, the awakening to the Enlightened One's wisdom, the entry into the Enlightened One's wisdom.
4 Turnings of the Wheel of Dharma: the dharma wheel of goodness and purity, the dharma wheel of expedient means, the dharma wheel of truth, the dharma wheel without residue.
4 Wisdoms of the Buddha: great mirror wisdom, wisdom of equality, profound observing wisdom, perfecting wisdom.