Anselm was a philosopher and leader of the church in 11th Century in England. He believed in defending the Christian faith and he gained much recognition from his work and the Ontological Argument. From the Ontological Argument, Anselm expresses, "fides quarens intellectum", which translates to "faith in search of understanding". In his argument, he raises several points that persuade the reader. One of them being that God's existence is not only in the mind, but also in reality. The atheist or fool understands that there is something than which nothing greater can be imagined. With this in mind, atheists have an idea of God, but it is up to them whether they choose to believe or not. Ideas are strictly different from reality, and reality is greater than ideas from the mind. Anselm's Ontological Argument easily persuades one who is already a believer in God. .
God can be compared as ideas and reality. The reality of God is greater than the idea of God. "And surely that-than-which-a-greater-cannot-be-thought cannot exist in the mind alone. For if it exist solely in the mind, it can be thought to exist in reality also, which is greater." An idea of God can be thought, but it must exist outside in reality, in the mind and in the object of thought for God to be the greatest Being. The painter Anselm uses is a good example, "Thus when a painter plans beforehand what he is going to execute, he has [the picture] in his mind, but he does not yet think that it actually exists because he has not yet executed it. However, when he has actually painted it, then he both has it in his mind and understands that it exists because he has now made it." The painter can picture what he wants to paint in his head, but until he paints it, it does not exist. Another example is when a poem title is read, the meaning of the poem may not be developed until the poem has been read. God exists in our mind in which we use to think that there is no Being which is greater.