I'm glad to hear you had a good time at the party! It's understandable that you're concerned about becoming too complacent or comfortable and forgetting the issues that are important to you, but it is also important to hold onto these good times as well as you can. That joy and ease of mind and spirit can be fuel towards your work, it doesn't need to get in the way of it. Finding the balance is difficult, but essential.

If you have fun all the time and never concentrate on improvement (self or outside), then it can be detrimental, counter-productive, and empty-feeling. If you concentrate only on improving the world or yourself, then it can feel unrewarding, exhausting, and unsatisfying. Satisfaction can be found in doing both in good doses. Easier said than done of course, but there have to be (more) days or weekends where you do let go and enjoy life, to replenish your forces and energy, and embrace the reasons why this world is worth fighting for!