Conversation

This is an interesting word.  It does not require a lot of explanation, only a mention that in the language of the earlier translations of the Bible, this word did not mean (as it does today) merely that which you speak.  It also means the way in which you act, think and the overall picture you present to others who are observing you.

In other words, when the Scriptures say, “But as He which hath called you is holy, so be ye holy in all manner of conversation,” (1Pet 1:15) it does not refer merely to the spoken word (although this idea is definitely included) but to all manner of dealings including social, business and casual.