What Heaven Means?

The New Testament explains that Heaven is being In Christ.  Those who have died are at rest in Christ.  St. Paul explains this in Romans 6:23, that "the free gift of God is eternal life in Christ Jesus our Lord."  In 1 Cor 15:18 again St. Paul makes reference to those who have died as having "fallen asleep in Christ."  So being in Christ means being in Heaven.