Liquid was incredibly bitter towards Big Boss for apparently knowingly choosing Liquid to be the inferior one and Solid Snake having what he thought was the superior genes. Although his hatred for them knew no bounds, he was also driven by a sense of connection to his twin brother. His main drive was the belief that he bears all of Big Boss's recessive genes, and that he was born knowing that his brother was superior. He was driven to surpass his genetic destiny, and in essence, his father. However, he never learned the truth that it was in fact he that gained the superior genes, while Snake was the inferior. Therefore, in an ironic twist, it turns out that Snake did what Liquid had set out to do all along, with neither of them ever knowing.