What is realization? Webster defines it as "the act of converting from imaginary or fictitious into actual: of making one's own in apprehension and experience." Then to us students of Christian Science, realization is converting our beliefs in matter into the knowledge of Spirit, or growing into the true consciousness; it is making the Truth our own by demonstration.
Believing that God is Spirit, the Creator and source of all, how can mortals believe in matter, the opposite of Spirit? Surely in their healing of sickness they have to some extent proven the unreality of matter. Has matter satisfied their desires? has it met their needs? is it substantial? No. Then why do they continue to believe in it when all its statements prove false? Because they are ignorant of God.
When through suffering we have proved that we can not depend upon matter we are finally impressed with the idea that something is wrong, and we begin to lose faith in it; a little room is made for Truth, we are awakened to the fact that we had been worshiping a false god — matter — and we commence to learn of the true God — Spirit. Realization is born of experience.