Bhagavad Gita · Chapter 11: The Vision of the Cosmic Form
Bhagavad Gita 11.33
tasmāttvamuttiṣṭha yaśo labhasva jitvā śatrūn bhuṅkṣva rājyaṃ samṛddham | mayaivaite nihatāḥ pūrvameva nimittamātraṃ bhava savyasācin ||
Therefore stand up and win glory. Conquer your enemies and enjoy a prosperous kingdom. They have already been slain by me; be nothing more than the instrument, Arjuna.
Modern context
'They have already been slain by me; be nothing more than the instrument.' Nimitta-matra, merely the instrument, is one of the most important ideas in the Gita. Arjuna is not the author of what will happen; he is the means through which a larger order works. This does not remove his responsibility to act well. It removes the crushing weight of thinking that everything depends on him alone.