Peter had instructions for women married to non-Christians. “Wives, likewise, be submissive to your own husbands, that even if some do not obey the word, they, without a word, may be won by the conduct of their wives, when they observe your chaste conduct accompanied by fear” (1 Peter 3:1-2).
It is an interesting concept, winning souls to Christ “without a word.” Of course, this doesn’t mean that there is another way of saving souls other than through the preaching of the gospel (cf. Romans 1:16). Rather, it is a strong statement about the efficacy of good influence.
Many men are not swayed by the words of a preacher. However, if they see Christian principles in action - morality, integrity, kindness, mercy and love - they may become convinced that there is “something to” being a Christian. Then, when the gospel is shared, their heart is fertile and responsive to the truth.
It works when wives show a good example to their husbands, and when husbands show that same type of example to their wives. It also is effective in other familial relationships (an important principle for parents to consider), with friendships, and any others you may impact in the day to day exercise of your faith.
“Let your light so shine before men, that they may see your good works and glorify your Father in heaven” (Matthew 5:16).