DEAR REV. GRAHAM: My sister supposedly gave her life to Jesus when she was 8, but you'd never know it now. Will she go to heaven anyway, in spite of the way she's turned her back on everything Christian? —W.H.
Dear W.H.: Only God knows your sister's heart, and whether or not she honestly gave her life to Christ when she was young, and a remnant of faith still remains in her. No Christian is perfect, of course — but some day her true relationship with Christ will be revealed. The Bible warns, "Everything is uncovered and laid bare before the eyes of him to whom we must give account" (Hebrews 4:13).
Nevertheless, you're right to be concerned about her behavior, because one of the signs of a true Christian is a changed life. In fact, if there is no indication that a person wants to follow Christ, it's a sign that they may not be saved. The Bible compares a person like this to a corpse — physically present, but lifeless. It says, "As the body without the spirit is dead, so faith without deeds is dead" (James 2:26).
What can you do? First, pray for her. Pray that God will convict her of her godless ways, and will convince her of her need for Christ's forgiveness and new life.