And he said to all, “If any man would come after me, let him deny himself and take up his cross daily and follow me. For whoever would save his life [psyche] will lose it; but whosoever shall lose his life [psyche] for my sake [ἕνεκεν ἐμοῦ], he will save it. For what does it profit a man if he gains the whole world and loses or forfeits himself?
— Luke 9:23-5 (RSV)
Is his sake like your sake, or my sake, or God’s sake? What is a sake anyway? Are there any synonyms for that word? Where did it come from?
It came into English originally “for God’s sake,” according to the online etymological dictionary (consulted 25 March 2018):
{sake (n.1): “purpose,” Old English sacu “a cause at law, crime, dispute, guilt,” from Proto-Germanic *sako “affair, thing, charge, accusation” (source also of Old Norse sök “charge, lawsuit, effect, cause,” Old Frisian seke “strife, dispute, matter, thing,” Dutch zaak “lawsuit, cause, sake, thing,” German Sache “thing, matter, affair, cause”), from PIE root *sag- “to investigate, seek out” (source also of Old English secan, Gothic sokjan “to seek;” see seek).
Much of the word’s original meaning has been taken over by case (n.1), cause (n.), and it survives largely in phrases for the sake of (early 13c.) and for _______’s sake (c. 1300, originally for God’s sake), both probably are from Norse, as these forms have not been found in Old English.}
So we trace it back to a Proto-Indo-European root *sag- (which, as the asterisk signifies, is our best guess at what the original prehistoric form would have been, working back from the actually attested forms).
Who is the one ‘for whose sake heaven and earth came into being’? Was or is the primal person a seeker for his sake? Is there a primal cause, or purpose, or crime? Who is trying this case?
The answer is always there, but people need the question to bring it out.
— Thomas Cleary (1995, 164)