I am not optimistic or pessimistic. I feel that optimism and pessimism are very unbalanced. I am a very hard engineer. I am a mechanic. I am a sailor. I am an air pilot. I don't tell people I can get you across the ocean with my ship unless I know what I'm talking about.
Most importantly we have learned that from here on it is success for all or none, for it is experimentally proven by physics that "unity is plural and at minimum two" - the complementary but not mirror-imaged proton and neutron. You and I are inherently different and complimentary. Together we average as zero - that is, as eternity.