It is said, “Preach the gospel always; if necessary use words.” 

St. Francis undoubtedly meant that you have to live the gospel, which is very true though his lifestyle was so radical that even in his homeland with its “Christian” worldview, it wouldn’t have been hard to notice something was different.  However, Francis was no Trappist (a monk who takes a vow of silence) and had plenty to say or we wouldn’t have so many of his quotes!

Today (amazingly) words are always necessary in proclaiming the gospel.  I’ve met very nice and helpful Hindus and Buddhists.  I’ve known Muslims who believe in being very moral and hospitable.  So, unless you tell people why you do what you do (and don’t) they won’t necessarily know that you serve Jesus and how they can serve him too.  Words alone aren’t enough and can quickly lead to hypocrisy.