The whole universe is one. There is only one Self in the universe, only One Existence, and that One Existence, when it passes through the forms of time, space, causation, is called by different names, buddhi, fine matter, gross matter, all mental and physical forms. Everything in the universe is that One, appearing in various forms. When a little part of it comes, as it were, into this network of time, space and causation, it takes forms. Take off the network, and it is all one.
Our time on Earth is already short enough. For me, it's like every single day I try to be as happy as I can. It's crazy to think about. We never have enough time. That's always the thing. We always want to do more. So it's about being able to spend time on the things that are most important to you. Life is a lot easier that way, and obviously life is pretty difficult a lot of the time.