The first, and best-known, ontological argument was proposed by St. Anselm of Canterbury in the 11th. century A.D. In his Proslogion, St. Anselm claims to derive the existence of God from the concept of a being than which no greater can be conceived.
plato.stanford.edu/entries/ontological-arguments/ plato.stanford.edu/entries/ontological-arguments/
Descartes often compares the ontological argument to a geometric demonstration, arguing that necessary existence cannot be excluded from idea of God anymore than the fact that its angles equal two right angles, for example, can be excluded from the idea of a triangle.
plato.stanford.edu/entries/descartes-ontological/ plato.stanford.edu/entries/descartes-ontological/
Ontological argument - Wikipedia, the free encyclopedia
ontological argument for the existence of God attempts the method of a priori proof, which uses intuition and reason alone. In the context of the Abrahamic religions, ontological arguments were fi...
en.wikipedia.org/wiki/Ontological_argument
Anselm's Ontological Argument ... Anselm's ontological argument purports to be an a priori proof of God's existence. Anselm starts with premises that do not depend on experience for their justification and then proceeds by purely logical means to the conclusion that God exists.
www.princeton.edu/~grosen/puc/phi203/ontological.html www.princeton.edu/~grosen/puc/phi203/ontological.html
A layperson's introduction to the ontological argument. It explains what it is, what it argues, how it is justified in addition to a variety of objections and rejoinders of this argument. ... One argument used to rationally support the existence of God is the ontological argument. There are many forms of ontological...
www.angelfire.com/mn2/tisthammerw/rlgnphil/ontological.... www.angelfire.com/mn2/tisthammerw/rlgnphil/ontological.html
One of the most fascinating arguments for the existence of an all-perfect God is the ontological argument. While there are several different versions of the argument, all purport to show that it is self-contradictory to deny that there exists a greatest possible being.
www.utm.edu/research/iep/o/ont-arg.htm
The Ontological Argument. An explanation of the argument that once we have grasped in our minds the concept of God we can see that his non-existence is impossible. ... The ontological argument is an argument for God’s existence based entirely on reason. According to this argument, there is no need to go out looking...
www.existence-of-god.com/ontological-argument.html www.existence-of-god.com/ontological-argument.html
Introduction, excerpts from the Proslogion, Gaunilo's Response, and Anselm's Reply, plus some commentary by David Burr on the ontological argument. ... Anselm's argument - which explained the course of sacred history not only in broad outline but in excruciating detail - made the whole thing very accessible to human reason,
www.fordham.edu/halsall/source/anselm.html
From the Proslogium ... Therefore, Lord, who grant understanding to faith, grant me that, in so far as you know it beneficial, I understand that you are as we believe and you are that which we believe. Now we believe that you are something ... The argument is given below in it's original form (translated by Jonathan Barnes).
www.anselm.edu/homepage/dbanach/anselm.htm