Scientific or artistic pursuit can become as worthless as just living only for money, if you do not have a reason why you are doing it. I admired the philosophy of doing it for your enjoyment or pleasure. But then pleasure and fun is subjective and changes with time as well. What is fun for you today might not be tomorrow or day after? So what will you do? Leave that and find something else for 'fun'. Ofcourse you must have to have fun to do well in what you are doing, but then that is not the be all and the end-all.
Here is a delightful perspective in living life by Eknath Eeswaran.
I want to go on living even after my death! And therefore I am grateful to God for giving me this gift, this possibility of developing myself and of writing, of expressing all that is in me. I can shake off everything if I write; my sorrows disappear, my courage is reborn.
– Anne Frank
When you discover that everyone is contained in you and you are contained in everyone, you have realized the unity of life, which is the divine ground of existence. Then you are not just a person; you have become a beneficial force. Wherever you go, wherever you live, those around you will benefit from your life.
The life of such a person, such as Mahatma Gandhi in our own times, becomes a permanent, selfless force on this earth, because even after death his influence continues to bring people together, to make them aware of their trusteeship for the resources of the earth and for all creatures. Gandhi is still alive because he is still at work as a real force, advancing peace, good will, and unity.
Even one unassuming man or woman leading a selfless life, though he or she may live only a few years on earth, enriches all life for all time to come. Even if one person in a community is leading a selfless life, he will make his contribution, and she will slowly inspire others to make the same contribution, because human nature responds to such an example.