Ephesians 6:5 - 9 (NRSV) Slaves, obey your earthly masters with fear and trembling, in singleness of heart, as you obey Christ; not only while being watched, and in order to please them, but as slaves of Christ, doing the will of God from the heart. (religion.blogs.cnn.com)
Just like the promise, this fundamental hope was articulated in particular hopes — hopes for a more or less cataclysmic interruption of history, when God would establish his kingdom of justice and of peace upon earth, when Israel would be saved from enemies without and sinners within, to serve their God with singleness of heart. (religion-online.org)