D.L. Moody :

In 1st Thessalonians, 5th chapter, we are told not to Quench the Spirit. Now, I am confident the cares of the world are coming in and quenching the Spirit with a great many. They say: “I don’t care for the world;” perhaps not the pleasures of the world so much after all as the cares of this life; but they have just let the cares come in and quench the Spirit of God. Anything that comes between me and God – between my soul and God –

quenches the Spirit. It may be my family. You may say: “Is there any danger of loving my family too much?” Not if we love God more; but God must have the first place. If I love my family more than God, then I am quenching the Spirit of God within me; if I love wealth, if I love fame, if I love honor, if I love position, if I love pleasure, if I love self, more than I love God who created and saved me, then I am committing a sin; I am not only grieving the Spirit of God, but quenching Him, and robbing my soul of His power.

Source : http://www.sermonindex.net/modules/articles/index.php?view=article&aid=6015