Kant believed that there are only three proofs of God's existence by pure reason: These are the ontological proof, The Cosmological Proof and The Physico-theological Proof.
The ontological proof define God as the most real being; which is the subject of all predicates that belong to being absolutely. It is for those who believe the proof valid that since existence is such a predicate, this subject must have the predicate existence e.i. must exist.
The cosmological proof says: if anything exist, then an absolutely necessary Being must exist: Kant also explains it in form of " I Know I exist: therefore an absolutely necessary being exists."
The Physico-theological proof is the familiar argument from design, but in a metaphysical dress. Kant argues that the universe exhibits an order which is evidence of purpose. He respects this argument but points out that,at best, it proves only an Architect, not a creator, and therefore cannot give an adequate conception of God. Kant concludes that only theology of reason which is possible is that which is based upon moral laws or seeks guidance from them.
Hegel
Hegel begins an argument of his logic by the assumption that " the Absolute is pure being"; we assume that it just is, without assigning any qualities to it. But pure being without any qualities is nothing; therefore we are led to the antithesis:' The absolute is nothing' . This could be seen as babies are nothing till they grow up as they are not born with qualities.
