To the Jews I became like a Jew, to win the Jews. To those under the law I became like one under the law (though I myself am not under the law), so as to win those under the law. To those not having the law I became like one not having the law (though I am not free from God's law but am under Christ's law), so as to win those not having the law. To the weak I became weak, to win the weak. I have become all things to all men so that by all possible means I might save some.
1 Corinthians 9:20-22

In your hearts set apart Christ as Lord. Always be prepared to give an answer to everyone who asks for the reason for the hope that you have. But do this with gentleness and respect.
1 Peter 3:15