So when I think of, what is the meaning of life, to me, that's not an eternal unanswerable question. To me it is in arms reach of me every day.
Neil deGrasse TysonDark matter and dark energy are two things we measure in the universe that are making things happen, and we have no idea what the cause is.
Neil deGrasse TysonMany people are unhappy because there was some point in their past where there was some glory day, and as they get older they're not creating more glory days. They reflect on a time that they will never reach again, and it brings some level of dissatisfaction into their lives. I have circumvented that by simply making incumbent upon myself to always be productive in ways that are consistent with my physical body, my mental state of knowledge, but more important, my presumed growth in wisdom that would come with age.
Neil deGrasse Tyson