A. This is a common question. Some other ways that it can be asked are, “How can I know that God has chosen me as one of His children?” and, “How can I be assured of God’s love for me?” It is, in fact, a question of what theologians call assurance.
I know people who have come up with all sorts of elaborate ways to answer this question. They tell people to look at themselves and see how they have changed since the time they think they became a Christian. They tell them to look at their love for others, their Christian works, their growth in Scriptural knowledge, their better morality, how much they love the law, and so on. Others will also advise people to wait for a vision, a voice, or a feeling to know they are saved.