Isn't John the Baptist's humble statement, "the thongs of whose sandals I am unworthy to untie," a bit overstated? Are we unworthy to serve Christ? If so, why? If not, why not?
No, it's not overstated, it really speaks to the enormity of Jesus as Messiah and God head in the Trinity. None of us are worthy, because of our sin which separated us from God. However, we become worthy to serve Christ when we accept Him and The Holy Spirit (down payment). When we accept Christ as Lord, we become joint-heirs with Him and official sons of the Most High God. (Romans 8:16-17)