Physical food only sustains our temporary bodies for the few years we live here on earth. It takes spiritual food to give us spiritual strength to "walk in the Spirit" (Galatians 5:16, 25) and to fight spiritual battles with spiritual weapons (2 Corinthians 10:4) against spiritual foes (Ephesians 6:12) as citizens of the spiritual Kingdom of Heaven (John 3:5).
When Jesus calls you/me into ministry (any kind of ministry; Romans 12:4-8), what will be our response?Will we immediately make the step of faith? Or will we hold back (making the usual excuses)?When Jesus makes the call, do we have our minds set for service?