“Appearances deceive because they are appearances and not reality. Dwell not on them in any form. They but obscure reality, and they bring fear because they hide the truth. (ACIM, T-30.IV.5:1-3)
Try to think of light, formless and without limit, as you pass by the thoughts of this world. And do not forget that they cannot hold you to the world unless you give them the power to do so. (ACIM, W-44.10:2-3)
… try to remember how important it is to you to understand the holiness of the mind that thinks with God. Take a minute or two, as you repeat the idea throughout the day, to appreciate your mind’s holiness. Stand aside, however briefly, from all thoughts that are unworthy of Him Whose host you are. And thank Him for the Thoughts He is thinking with you. (ACIM, W-45.9:1-4)
Miracles are examples of right thinking, aligning your perceptions with truth as God created it.
A miracle is a correction introduced into false thinking by me. It acts as a catalyst, breaking up erroneous perception and reorganizing it properly. This places you under the Atonement principle, where perception is healed. Until this has occurred, knowledge of the Divine Order is impossible. 
The Holy Spirit is the mechanism of miracles. He recognizes both God’s creations and your illusions. He separates the true from the false by His ability to perceive totally rather than selectively. (ACIM, T-1.I.36:1–38:3)
Be innocent of judgment, unaware of any thoughts of evil or of good that ever crossed your mind of anyone. Now do you know him not. But you are free to learn of him, and learn of him anew. Now is he born again to you, and you are born again to him, without the past that sentenced him to die, and you with him. Now is he free to live as you are free, because an ancient learning passed away, and left a place for truth to be reborn. (ACIM, T-31.I.13:1-5)
You have no idea of the tremendous release and deep peace that comes from meeting yourself and your brothers totally without judgment. When you recognize what you are and what your brothers are, you will realize that judging them in any way is without meaning.” (ACIM, T-3.VI.3:1-2)
acim.org, Chapter 1: The Meaning of Miracles, Principles of Miracles (acim.org/acim/chapter-1/principles-of-miracles/en/s/53), ACIM, T-3.ACIM, T-30 T-31.ACIM,,W-45.