The Sallatha Sutta (SN 36.6) in the Pali Canon is well-known in the Theravada and MBI (mindfulness-based-intervention -- MBSR, MBCT, etc) worlds for the two-arrows paradigm.
The first arrow is a physical pain (or in modern readings, also primary emotional pain such as loss of a loved one). The second arrow, which ones shoots at oneself, is the emotional reaction to the first-arrow pain. The first arrow is inevitable -- it's part of being in samsara; the second arrow is not inevitable and is preventable dukkha.
It's sometimes expressed in the aphorism -- pain is inevitable; suffering is optional.
My question -- is this paradigm, aphorism or sutta discussed anywhere in the Mahayana? I cannot find it in the Gelug Lam Rim (via Pabonka), but maybe it's elsewhere, or subsumed under something else? But perhaps this sutta is not included in the Tibetan canon (the Kangyur) at all.
Below is the two-arrow (dart) excerpt, Bikkhu Bodhi's translation. (But you might want to read the whole sutta; even though it is fairly short, there is a lot more to it than what's covered by most contemporary teachers and commentators.)
Bhikkhus, when the uninstructed worldling is being contacted by a painful feeling, he sorrows, grieves, and laments; he weeps beating his breast and becomes distraught. He feels two feelings a bodily one and a mental one. Suppose they were to strike a man with a dart, and then they would strike him immediately afterwards with a second dart,so that the man would feel a feeling caused by two darts. So too, when the uninstructed worldling is being contacted by a painful feeling ... he feels two feelings—a bodily one and a mental one.
Bhikkhus, when the instructed noble disciple is contacted by a painful feeling, he does not sorrow, grieve, or lament; he does not weep beating his breast and become distraught. He feels one feeling a bodily one, not a mental one. Suppose they were to strike a man with a dart, but they would not strike him immediately afterwards with a second dart, so that the man would feel a feeling caused by one dart only. So too, when the instructed noble disciple is contacted by a painful feeling ... he feels one feeling—a bodily one, not a mental one.