2 Corinthians 5:20

Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God.

ambassadors an accredited diplomat sent by a country as its official representative to a foreign country.

John 14:6

Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.