Miracles are a change in perception ~ a change in mind.

A miracle is a correction. It reminds the mind that what it sees is false. It paves the way for love’s awakening, for fear must slip away under the gentle remedy it brings. It inverts perception which was upside down and ends the distortions that were manifested. Miracles fall …like drops of healing rain.
Miracles occur naturally as expressions of love. The real miracle is the love that inspires them. In this sense everything that comes from love is a miracle.50 Principles of a Course in Miracles