Ego is a construct; it is related to our energy level.
If our energy is below a certain level, the ego is very real;
If our energy is above a certain level, the egoic sense of distinct self melts away.
Energy level is related to action. This is because energy does not exist in stasis. Energy must flow. If energy slows down enough, it becomes matter; E=mc^2. Whether we are more energy or more matter depends on how much we flow, move. The ego is a function of how much we live as a matter-self, rather than an energy-self.
Energy flows, not just in us, but between us. As energy-selves, we are not distinct from one another. As energy-self, I am most effective when I recognize it is not I who affect others, but the energy that flows through me. I do not work; work is done through me.
The spiritual ambition of self-less existence can only be achieved above the energy level of the ego. To reach that energy level, we must be like energy; we must flow; move. Spiritual awakening can not be realized if we sit still. We must move, effect, live out our awakening by flowing energy to others. In the course of flowing, we awaken more.
Can this principle be found in Christianity? Yes. The old testament prophets all took bold actions and risks to receive and deliver the prophecy. God is said to have "called them" to actions they did not want to take. Without acting in response, God's word would have gone undelivered and ceased to flow through them.
Yet Jesus spoke of love, not action. Why does one of the chief frustrations of sincere Christians seem to be the lack of guidance on which actions one should take? Love itself can be taken as some passive attitude indulged in from the privacy of one's mind, with no action attached. However, though we might mistake love this way, there is no evidence of Jesus loving without action. He healed, touched, visited, traveled, shared, anointed, intervened. Jesus was always moving in the course of loving. Only nailed to the cross was he cut off from God.