Don't quench the Spirit.
For discussion of the Sin against the Holy Spirit, from the viewpoint of its being "an eternal sin," see my Commentary on Matthew, pp. 173-175.  Any sin that quenches the Spirit of God in Christian hearts is the eternal and unpardonable sin.  The soul draws back from the contemplation of so terrible a disaster as that.  Oh child of God, keep the holy fire alive. As the vestal virgins in the ancient Roman temple guarded the sacred flame with their lives and constant devotion, let Christians tend the sacred token of heaven that burns in their souls.  In Atlanta, Georgia, there is a burning street lamp, the flame of which dates back to the Civil War, a link with the past which that community has faithfully guarded for over a century.  How much more should people who have tasted the good word of God and the powers of the age to come and have been made partakers of the Holy Spirit guard against those evils which continually threaten to quench his blessed presence in their hearts!