“Christianity is enshrined in the life: but it is proclaimed by the lips. If there is a failure in either respect the gospel cannot be communicated” (Michael Green, Evangelism in the Early Church, 194).
One of my pastors back in Indiana use to say, “You need to wear your theology.” In the quote above, Michael Green is saying the same thing. There are two parts to Gospel Communication: 1) Life and life-style and works — aka, one’s agenda/what you do, and 2) the words and speech that dance on your lips — aka, one’s creed and confession/what you proclaim. That is, you need to wear/live what you believe (your theology). Therefore, Gospel Communication consists of two parts, and the twain ought not to be separated.