Within the depth-psychology corpus, 'sap' operates along several distinct but interrelated axes. Most fundamentally, it appears in Onians's philological archaeology of archaic physiology, where sap belongs to a constellation of vital fluids—seed, cerebro-spinal fluid, synovial fluid, sweat—understood as the very stuff of life-force, consciousness, and generative power. The Old Icelandic safi ('sap') and sefi ('mind') are shown to be cognate, establishing an etymological bridge between vegetable vitality and psychic intelligence that illuminates the Latin sapere and sapiens. In alchemical literature, treated extensively by Abraham, Jung, and von Franz, sap assumes a more symbolic register: the congealed sap of the philosophical tree becomes amber-gold, the coagulated essence of the opus, a potent emblem of the lapis. Onians further documents funeral rites in which oily sap—along with myrrh and other arboreal exudations—was offered to the dead as compensatory life-fluid, sucus replacing what the departed had lost. Hillman draws the sapor/sapientia connection into his senex-puer phenomenology, treating 'tasted knowledge' as the milk of true wisdom that dissolves Saturnine rigidity. The term thus traverses physiology, etymology, alchemy, and archetypal psychology, always circling the question of how vital substance becomes mind.
old Icelandic sqfi 'sap', sefi 'mind' with froDa, frodr (p. 68, n. 7), vatr 'wet' for 'wise', Purr 'dry' = ignorant
Onians demonstrates that Germanic cognates link sap directly to mind and intelligence, establishing a philological foundation for the archaic equation of vital fluid with psychic capacity.
, The origins of European thought about the body, the mind,, 1988thesis
Not only the oily sap of the olive but also myrrh, incense (tus), and other exudations, 'tears' or 'sweat' as the Greeks and Romans termed them, from trees were used, sap to compensate for the 'sap' (sucus) the dead had lost.
Onians documents the funerary use of tree sap and exudations as ritual substitutes for the life-fluid the dead were believed to have lost, situating sap within a thanatological economy of vital substance.
, The origins of European thought about the body, the mind,, 1988thesis
The congealed sap of the philosophical tree is seen as part of the tree's 'fruit', and this fruit is silver and gold... The alchemists saw amber, the golden, coagulated sap, as a potent image for the gold which issued from their growing metallic tree.
Abraham establishes that in alchemical imagery the coagulated sap of the philosophical tree functions as the primary emblem of gold and the perfected Stone, linking vegetable vitality to the ultimate product of the opus.
, A Dictionary of Alchemical Imagery, 1998thesis
The milk is 'tasted knowledge' and its taste (sapor) produces the sabrosa of the true sapientia.
Hillman draws the sapor-sapientia etymological thread into his phenomenology of wisdom, arguing that genuine knowledge is always a matter of immediate, embodied tasting rather than abstract cognition.
, Senex & Puer, 2015thesis
Its original meaning (e.g. occisam saepe sapere plus multo suem or oleum male sapiet) was 'to be flavoured, have flavour'. It described an object as having something in it which could be received in tasting.
Onians traces sapere to its primary sense of containing flavour or juice, demonstrating that wisdom-language in Latin originates in the notion of an object's vital sap being receivable through the organ of taste.
, The origins of European thought about the body, the mind,, 1988supporting
'wheat has in it a certain sweet and sticky juice, which is so to speak its ψυχή'
Onians cites ancient identification of a plant's inner juice or sap with its soul (psyche), extending the archaic vital-fluid doctrine from animal physiology to the vegetable kingdom.
, The origins of European thought about the body, the mind,, 1988supporting
Kapπάσσov [n.] name of a plant with poisonous sap: 'white hellebore, Veratrum album'... ὀπο-Κάρπασσov (Dsc.; Lat. opocarpathon) = ὀπός Καρπάσου 'sap of the K.'
Beekes's etymological data attests the technical Greek lexicon for plant sap (ὀπός) as a pharmacological category, situating sap within ancient botanical and medical classification.
, Etymological Dictionary of Greek, 2010supporting
Saturn the senex in his dual nature, cut off from life, bound by the ligatures of his obligations and locked in the constructs of his own systems, lies on the ground exhausted and thirsting: from power to helplessness.
Hillman uses the image of the thirsting senex to evoke a psychic desiccation—an absence of the vital sap or nourishing fluid—that must be remedied by the milk of sapientia.
, Senex & Puer, 2015supporting
Sirius dries up the head and knees (γοῦνατα) and the flesh is dried up with the heat
Hesiod's passage, as analysed by Onians, links the drying of the knees—repositories of generative sap—to summer heat, illustrating the climatological dimension of vital-fluid physiology.
, The origins of European thought about the body, the mind,, 1988supporting
Sweat would naturally seem to be the stuff of strength, vigour, since it is expended when strength, vigour, is expended, and conversely he who sweats through external heat feels loss of strength, of vigour.
Onians places sweat within the same physiological cluster as sap and synovial fluid, all conceived as the expendable life-substance whose presence constitutes vitality and whose loss marks depletion.
, The origins of European thought about the body, the mind,, 1988aside