The Purpose of Life

At one end of the road, some would smile heartily:
They've had a happy life, a calm one it may be,
Full of laughs and love, but peaceful and placid;
It is the least one could ask for to be pleased.

But what is the purpose of one's life?
Is it to content others more than one's self?
To follow the paths pointed by the diktats of the society?
And to never cross that boundary...?