What is the meaning of life?

Recently i was so busy with all the homeworks, tuition works, and so on. So busy that i didn't even have time to rest. Last night my boss asked me to become one of the partners of the tuition center. Of course i was happy because i will get extra payment next month. I suddenly felt that all my hard works did pay. Although i need to teach extra classes in the coming months, but i still felt worthy.

And then this morning, i received a call from my mother, she told that my grandmother just pass away. Mood dropping low certainly. I suddenly wonder what is the purpose we alive??
To make ownself busy?? To get promoted?? To extra payment?? To be happy?? To gain more knowledge??? What's actually motivate us to continue our lives??