SN ^47.2 defines 'sati' (mindfulness) as doing this all the time (24/7 samādhi):

He lives continuously seeing the body as a body [as it truly is].	kāye kāyā-(a)nu-passī viharati
He lives continuously seeing sensations as sensations [as it truly is].	vedanāsu vedanā-(a)nu-passī viharati
He lives continuously seeing a mind as a mind [as it truly is].	citte cittā-(a)nu-passī viharati
He lives continuously seeing ☸Dharma as ☸Dharma [as it truly is].	dhammesu dhammā-(a)nu-passī viharati
[in each of the 4 ways of remembering]:	(… elided refrain from each way…)
he is ardent 🏹, he has lucid discerning 👁, he remembers 🐘 [to apply relevant ☸Dharma].	ātāpī sampajāno satimā,

he should remove greed and distress regarding the world.

vineyya loke abhijjhā-do-manassaṃ;

5 – 5⛅ 7☀️ 16🌬️😤‍ 💀 🏃‍ 31🧟‍ S&S🐘💭 V&V💭

Sammā Sati 🐘

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disambiguation

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see sati for more detail

The generally accepted idea at the time of this writing, which is wrong,
is that sati means very different things in different contexts in the suttas.

Sati is memory

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The elephant never forgets.

sati = remembering = two way memory access, memorization + recollection (SN 48.9 sati-indriya).
SMRTI = You (S)uppose to (M)emorize and (R)ecollect (T)errific (I)deas.
SATI = You (S)uppose to (A)ctualize (T)errific (I)deas
☸Dhamma = those (t)errific (i)deas.

sati remembers ☸Dhamma. Always.

Meaning of the cryptic 4sp🐘 formula

He abides, continuously seeing the body as a body, [as it actually is, according to reality]...
He abides, continuously seeing the experienced-sensations as experienced-sensations, [as it actually is, according to reality]...
He abides, continuously seeing the mind as mind, [as it actually is, according to reality]...
He abides, continuously seeing the ☸Dhamma as ☸Dhamma, [as it actually is, according to reality]...
🔗proof & details

S&S🐘💭 sati & sam-pajāno, remembering & lucid-discerning

S&S🐘💭 is as ubiquitous as a peanut-butter-&-jelly 🥜🍓🥪 sandwich.
Whenever you see the word 'sati' in isolation in the EBT,
what it usually means is S&S at the minimum,
4sp🐘 by definition (SN ^47.2),
or the entire 7sb☀️ headed by sati-sambojjhanga is implied.
S&S🐘💭 = Insight: In EBT, S&S performs the role of insight.
S&S is explicitly stated in third jhāna.
There is no "access concentration" (upacāra samādhi) in EBT.
V&V💭: vitakka & vicāra: directed-thought & evaluation:
In first jhāna, V&V is essentially a coarser form of S&S.
See 4 Jhānas🌕 ≈ 4 Satipaṭṭhāna🐘.

There is no time out or off-switch for sammā-sati

”Sati” should be “always on”: or you will be in grave danger.

4 – Sammā Sati ≡ 4sp🐘 sati'paṭṭhāna

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And most of the time in the suttas, when it’s a Buddhist context,
just the bare term ‘sati’ = Sammā Sati 🐘 ≡ 4sp🐘

4.1 – 4sp#1: Kāye kāya anu-passana

see only 1 way‍ ^8.7.1 – 4sp1

4.2 – 4sp#2: Vedana-anupassana

see only 1 way‍ ^8.7.2

4.3 – 4sp#3: citta-anupassana

see only 1 way‍ ^8.7.3

4.4 – 4sp#4: Dhamma-anupassana

see only 1 way‍ ^8.7.4

10 – misc.

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10.1 – suttas focusing on sati

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SN ^47.0 Sati-'paṭṭhāna 🐘 Saṃyutta: 104 suttas: 4sp remembrance-establishings

MN ¹⁰ Sati-’paṭṭhāna is overrated. Study this instead:

ASK: (A)n-uttara (S)ati-’paṭṭhāna (K)handha Sutta
The un-excelled remembrance-establishing aggregate discourse.
ASK not what the Dhamma can do for you.

10.2 – samādhi nimittas: Meditation subjects for 4sp🐘 → 7sb☀️

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One ☸Dharma: The EBT meditation crown jewel

SN ^54.1 Eka-Dhamma: First sutta in the Ānā-pāna-s-sati collection 16🌬️😤‍
SN ^54.11: The Buddha did this on his personal retreats, and praises it profusely in the conclusion.

3 – eka-☸Dhammo sati rememberings that lead to virāga...nirvana (AN 1.296)

1. 16🌬️😤‍: in-breath (&) out-breath remembering,
2. maraṇa-s-sati 💀: death remembering
3. kāya-gatā-sati 🏃‍: body-immersed-remembering

4 – core meditations

(see 4 core meditations)
1) asubha 🧟 → remove lust and passion
2) metta ☮️ → remove ill will
3) 16 APS 🌬️😤 → remove vitakka/thinking
4) a-nicca-sañña ⌛💭 → uproot pride, conceit, self

6 – anu-s-sati-ṭ-ṭhāna AN ^6.29: 6 recollection foundations

(1. STED Jhānas 1-3 for diṭṭha-dhamma-sukha-vihārāya)
(2. STED smd-asnd: āloka-saññaṃ leads to ñāṇa-dassanap-paṭi-lābhāya )
(3. STED 31asb: 31 non-beautiful body parts for removal of kāma-rāga)
(4. STED 9siv: stages of corpse decay, for removal of self and conceit Asmi-māna-samugghātāya)
(5. STED 4th jhāna for aneka-dhātu-paṭi-vedhāya)
(6. rememberful activities for sati and sampajāno)

6 – more anu-s-sati-ṭ-ṭhāna AN ^6.10

(1. Buddh-ānu-s-sati)
(2. Dhamm-ānu-s-sati)
(3. Saṅgh-ānu-s-sati)
(4. Sīl-ānu-s-sati)
(5. Cāg-ānu-s-sati)
(6. Devat-ānu-s-sati)

20 – meditation subjects fed into 7sb☀️ engine

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Ānāpāna Vagga 7

SN ^46.57 Aṭṭhika: 💀☠️ Skeleton-(perception/sañña)
SN ^46.58 Puḷavaka: 🐛🧟 worm-infested
SN ^46.59 Vinīlaka: 🧟🏿 black-and-blue-[corpse]
SN ^46.60 Vicchiddaka: 🕸️🧟 fissured-[corpse]
SN ^46.61 Uddhumātaka: 🧟🏻‍♀️ bloated-[corpse]
SN ^46.62 Mettā: 1.🤝🤗 friendly-kindness
SN ^46.63 Karuṇā: 2.👐😊️compassion
SN ^46.64 Muditā: 3.😊 rejoicing [in skillful Dharmas]
SN ^46.65 Upekhā: 4.🛆👁️ equanimous-observation
SN ^46.66 Ānā-pāna-sati: 16🌬️😤‍ breath-remembering

Nirodha Vagga 8

SN ^46.67 a-subha 🧟‍: non-beautiful [usually 31asb🧟‍ body parts]
SN ^46.68 Maraṇa: 💀⚰️ death-(perception/sañña)
SN ^46.69 Paṭikkūla: 🍲💩 loathesome: āhāre paṭikūla-saññā, food repulsiveness-perception
SN ^46.70 Sabba-loke: 🌐😞 entire world: Sabba-loke an-abhi-rati-saññā, The-entire-world; non-delight-(in that)-perception
SN ^46.71 A-nicca: ⏳ im-permanence (perception)
SN ^46.72 Dukkha ⏳→💩: pain-&-suffering: A-nicce dukkha-saññā, (the)-im-permanent (as) pain-&-suffering-perception
SN ^46.73 An-atta: 💩→🚫🏃 not-self: dukkhe an-atta-saññā, pain-&-suffering (as) not-self-perception
SN ^46.74 Pahāna: abandonment (perception/sañña)
SN ^46.75 Vi-rāga: 🚫💑 dis-passion (perception/sañña)
SN ^46.76 Nirodha: cesssation (perception/sañña)

10.42 – 42 EBT Meditation subjects

42 EBT samādhi nimittas
Choosing a meditation subject:
Explore the 42 in more detail, and additional nimittas

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