It is widely argued that one should live life with purpose, but if one has not found their purpose in life- their vocation if you will-living for this concept or goal becomes difficult.
What then, you ask?
I believe living life with purpose does not necessarily mean one has found what they are called or born to do. I think it means your at least are on the path of finding your purpose, seeking it thorough reflection, interaction, and various forms of meditation. If one is on this path of purposeful living, then they are living with and for a purpose.