If you sow to your flesh you will go to hell 

It doesn't matter if you are lost or if you are a Christian 

Galatians 6:7-8 
Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap. For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting