Bhagavad Gita, Chapter 2, Verse 32

Fortunate indeed are the Kshatriyas, O son of Prithâ, who are called to fight in such a battle, one that comes unsought as an open gate to heaven.

A warrior called to defend what's right, without even seeking it out, is being handed a rare kind of opportunity.

Krishna isn't asking Arjuna to go looking for a fight. This one found him, and stepping into a duty that arrives on its own is treated as a kind of fortune, not a burden.