Spinoza 's critical analysis of existence proof

For Spinoza, God or Substance is a unique and absolute fact. He acclaims that his essence is enough to prove the actual and real existence of god. Spinoza explains this point in the eleventh proposition in the MORAL book and then he supports this proposition by four types of proofs and trying to prove the existence of God. His proofs are expressing the necessity of God's existence through his essence imagination, his absolute ability to being and create the beings that it is due to the lack of obstacle for his being. Then it is possible to imagine the God as the most complete and infinite essential being. Indeed, all of his proofs are reduced and referenced to the clear and determined imagination in Descartes that it can be deduced the existence of God from his imagination. Finally, the proofs of Spinoza are either rebuilding of previous proofs or repeating them that they are presented independently in one proposition with some small differences