Krishna describes the state of an enlightened person, Jeevan Mukta, Stita Pragya. In that context, enlightenment is described by Krishna as stabilized wisdom. The spirit who loves wisdom which is truly spiritualized by the most intense love. So in the midst of struggle, there's a deep calm within.
"Do not pray for the fulfillment of your wishes, for they may not accord with the will of God. But pray as you have been taught, saying: Thy will be done in me (cf. Luke 22:42). Always entreat Him in this way - that His will be done. For He desires what is good and profitable for you, whereas you do not always ask for this." - Evagrius Ponticus.
Swami Sarvapriyananda speaks on Evagrius's teachings on prayer.