The Armor of God - Shoes of the Readiness that Comes From The Gospel of Peace

Does it ever occurred to you that it is odd that Paul should point out the shoes that a Roman soldier wears as part of his armor? What has the shoes got to do to protect the soldier? you may ask.  

Ephesians 6:15

New International Version (NIV)

¹⁵ and with your feet fitted with the readiness that comes from the gospel of peace.
I will tell you that a lot has to do with the type of shoes a soldier wears when he goes out for a mission. When I was serving my national service as a teenager, I recalled receiving my brand new pair of leather boots on the first day (in fact we received two pairs - for for training and the other for the parade square) and I had to 'break' them in and make them very comfortable for my legs. Like any new pair of footwear they do bite on the shin and the sole and walking in them for the first time was torturing but when one gets used to them, they will kind of 'blend' with the foot or rather the foot will blend with the shoes and soon they will become inseparable.
^{The feet carry us wherever we go and sometimes in our daily walk, we do come across unclean places and we need to wash our feet when we arrive home or when we reach our resting place. Jesus reminded us, on the night He was betrayed, after the Last Supper that we need to constantly wash our feet (John 13:1-11).
Now what is this washing of feet mean? We get a glimpse when we look at Ephesians 5:26-27} 

Ephesians 5:26-27

New International Version (NIV)

²⁶ to make her holy, cleansing^[a] her by the washing with water through the word, ²⁷ and to present her to himself as a radiant church, without stain or wrinkle or any other blemish, but holy and blameless.

We are reminded that the cleansing should be with water and here the water refers to the water of the word of Christ. You see, we need to be constantly reminded that we are the righteousness of God in Christ (2 Corinthians 5:21) and that there is no condemnation (Romans 8:1) even when we had failed or 'walked' into places that we should not have ventured into. Our lives should be one constant walk in the gospel of peace - peace because God the Father is no longer dealing with our sins since He already dealt judiciously with them on Jesus at the cross - and we should always be ready to share that peace. Paul calls the shoes the shoes of the readiness of the gospel of peace.