The Gita opens with a warrior on a battlefield, looking at the opposing army and recognising his own relatives, teachers and friends. He puts down his weapons and refuses to fight.
What follows is a dialogue in which he's persuaded to fight after all. That framing has generated centuries of interpretation, and the interpretations diverge sharply.
Why the framing is difficult
A text whose narrative conclusion is that a reluctant warrior should go to war is uncomfortable for readers who value non-violence, and it has been read in incompatible ways.
Literally. Duty requires action appropriate to one's role, and a warrior's duty is to fight a just war. Reluctance arising from personal attachment is precisely the attachment to be overcome.
Allegorically. The battlefield represents the moral struggle within a person, the opposing army represents attachments and impulses to be overcome, and the war is internal. This reading has a long history and considerable support in commentarial tradition.
Contextually. The text sits within a much longer epic in which the war's justification is established at length, and the narrative context is doing work that a standalone reading loses.
Serious commentators have argued for each, and the text supports multiple readings partly because it draws together several distinct religious and philosophical strands.
The philosophical core
Beneath the narrative frame, the argument concerns action, attachment and knowledge.
Action is unavoidable. The text rejects the option of withdrawal on the grounds that inaction is itself a choice with consequences, and that living requires acting. Renunciation of action is not available.
Attachment to results is the problem. The central teaching. Act according to what is right, without attachment to the outcome. This is not indifference to outcomes — it's the removal of the ego's investment in them.
The frequently quoted line about having a right to action but not to its fruits expresses this, and it's frequently read as fatalism when the text is arguing something more specific about motivation.
Multiple paths. The text presents several routes — the path of action, of knowledge, of devotion — and rather than ranking them absolutely, it presents them as suited to different temperaments.
That inclusivity is part of why the text has been so widely adopted across quite different traditions within Indian religion.
The reception history
The Gita's prominence is more recent than commonly assumed.
It was one text among many in a vast literature, and its elevation to something like a central scripture occurred substantially in the modern period, partly through translation into European languages and partly through its adoption by reform and nationalist movements.
Which means that the sense of it as the definitive statement of Hindu philosophy is a modern construction rather than a traditional one.
Different modern figures read it in strikingly different ways — as supporting non-violent resistance, as sanctioning armed struggle, as a manual for detached service. The same text supported opposed political programmes within the same period.
The detachment question
The teaching most easily misread, and the one most relevant outside its religious context.
Detachment from outcomes is frequently taken to mean not caring what happens, which produces either passivity or a convenient excuse for not examining consequences.
The text's argument is narrower. What's being renounced is the ego's stake — acting for the sake of what the outcome will do for you, rather than because the action is right.
Which means the person acting without attachment still cares about consequences, still chooses actions likely to produce good ones, and is simply not personally invested in being the one who produced them.
That's a demanding position rather than a permissive one, and it's frequently softened in retelling.
The ethical difficulty that remains
Being honest about the problem rather than resolving it.
The argument that duty attached to one's role determines right action raises obvious questions when roles are socially assigned and the social order producing them is itself unjust.
This has been a live issue in Indian thought and reform movements, and the text has been criticised on precisely these grounds by figures within the tradition.
Any reading that treats duty as simply given, without asking how roles were assigned and whether the assignment was just, is doing less work than the question requires.
Reading it
For anyone approaching it without a background in the tradition.
Read a translation with substantial commentary, since the text is compressed and assumes a great deal.
Read more than one, because translation choices are interpretive and different translators produce noticeably different texts.
Read it alongside something about its context — the epic it sits within and the philosophical debates it's engaging with.
And hold the interpretations loosely. A text that has sustained incompatible readings for centuries, from people who studied it far more closely than any of us will, is unlikely to yield a single obvious meaning on a first pass.