God in reality is greater than the idea of God in our mind. We have the advantage of being able to think of this Being which is greater, but we must apply Him to reality in order to understand there is nothing greater. Using the idea of the poem title, when it is read, for example "The River of Blue", it may be known to someone why it has its title. When the poem is read, the reality of it will become clear of why it is called "The River of Blue". This is much like God, we have His title of God, but we must learn and believe in Him in order to have a reality of Him. The existence of God can be present in our mind and in reality, but it is in reality at which He is greater. .
The fool or the atheist understands that there is no Being than which a greater can be thought, "But, surely, when this same Fool hears what I am speaking about, namely, "something greater-than-which-nothing-greater-can-be-thought", he understands what he hears, and what he understands is in his mind, even if he does not understand that it actually exists." It is one thing to know something, but another to know what you know. In other words, you may know about God in your mind, but until you believe in God and are educated with faith, you do not really know Him. The atheist knows the object of God in his mind, but because he does not understand, he chooses not to know God. "I believed before through Your free gift I now so understand through Your illumination, that if I did not want to believe that You existed, I should nevertheless be unable not to understand." This is important because Anselm indicates his faith is in search of understanding. Faith and or believing, makes it is easier to understand God. From this, several conclusions can be made. For example, someone is introduced to someone at a party and they only know each other by name. They can choose whether or not to have a conversation to learn about one another.