Conduct yourself in such a way that no one would be surprised if you told them you are a Christian.
1 Timothy 3:15, But if I tarry long, that thou mayest know how thou oughtest to behave thyself in the house of God, which is the church of the living God, the pillar and ground of the truth.
Many people have a distorted view of what true Biblical Christianity looks like. They believe what Mom or Dad taught them. They believe what secular schools tell them. They believe what they see on social media, in the newspaper, or on television. They believe anything but what the Bible says.
It would do us all good to pick up a Bible. Read it. Study it. Pray over it. Then apply it to our daily living so we can learn how to behave in order that some might be saved!