The mind of Holy Spirit is bi-directional, in that it both gives and receives equally. It isn't just a mind that gives, or just a mind that receives.
In the ego's mind, giving and receiving are separate, creating the illusion that cause and effect are separate - that you can give without receiving (attack), or receive (get) without giving.
In Holy Spirit's mind, what applies within applies without. What applies to you applies to others, and vice versa. It is a mind of complete equality.
Holy Spirit's mind is also a miraculous mind, in that because of the complete absence of separation between cause and effect, or inner and outer, or self and other, all illusions of separation are undone within its perception.
As we go `up` to the Holy Spirit's mind from our ego mind, we can be tempted to believe in ego terms that our journey is one-directional. We might say that we take our illusions to the truth. But it is also equally correct to say that the truth shines light upon our illusions.
We might also think one-directionally that we go and accept the Atonement for ourselves, but Atonement means at-one-ment which means it applies to us equally along with everyone else.
We could also come to think that a movement "towards" the Holy Spirit is a miracle, like a shift in perception from 'less' to 'more', or bringing illusions to truth. But what we're actually doing is leaving behind a thought-system of one-directionalness and separation, and moving into a thought-system of oneness and equality. It's apples and oranges.
We could therefore think (with ego-separation logic) that moving towards Holy Spirit is a miracle, but a miracle, being from the Holy Spirit's mind, must be bi-directional. It must be an act of both giving and receiving. It applies to you AND it applies to your brother. It heals the separation between you by recognizing that your brother IS your brother and not a stranger, and blesses both of your minds with healing.
The ego always thinks with one-directionality because it wants to keep giving and receiving separate, it wants to keep cause and effect separate, and it wants to ensure that every interpretation of what the Course means or what the Truth is like falls into its way of thinking about things as separate.
Miracles are unifying and are expressions of unity (love). This means not just that they lift you and your brother into Heaven or revelation, but that they also "bring" or "extend" Heaven into the Earth, shining it away. This is why, I believe, miracles subsequently are gifts you can give to others, and are not just something you claim for or use for yourself.