In your day job you are an engineer, an analyst, juggling with a lot of numbers, data, information and complex stuff. When you come home, had dinner, a talk with your life partner or friends, you still have time for your night passion. Let’s say 2-3 hours because you don’t watch television (anymore).
Your passion is a right-brain’s activity like drawing, painting, singing, dancing, juggling balls. I’m assuming that your day job is a left-brain-heavy profession. It can easily be vice versa. Important is that both are complementary to each other.
If your passion is similarly focussed on the same brain half’s work or even in the same field as your day job, there’s a big chance you’ll exhaust yourself or leave no more energy for you night passion. So, it can be wise to choose another field of profession for your day job or admit that your hobby should change.
The take-away from today: Leave energy and lust for things you’re passionate about. Find other areas of interest if day and night job are too equal, or change the field of your day job so you can enjoy your passion without the pressure of making money, but with your own pressure of wanting to learn and become really good at it.