Who am I?

After the prologue sets the scene, we are introduced more fully to John the Baptist. It seems that this whole first chapter is about defining identities, the identity and authority of Jesus being an obvious key element of the gospel narrative anyway.

John knows who is not and who he is. He is not Elijah, he is not the Messiah, he is not a prophet. He is the voice of one calling in the wilderness. John's self-identity is fundamental to his ability to say, "he must become greater I must become less". His self-understanding of his purpose and role adds to his purposefulness. 

Can I say the same?

If you asked me, "Who are you?" how would I define myself?