John 10:10 

The thief comes only to steal and kill and destroy; I have come that they may have life, and have it to the full. 

If you think your marriage will never come under attack. You are sadly mistaken the enemy is more clever and crafty than you can ever imagine. His ultimate goal is to destroy the family. He knows more about you than you think. He never stops attacking and lurking waiting for the precise moment when your at your weakest moment. ( 1 Peter 5:8 ) be alert and sober minded your enemy the devil prowls around like a roaring lion looking for someone to devour.  When harbor anger or resentment and bitterness towards your spouse you give Satan the tools to attack not only your mate but your household as well. He will not stop until a house divided  falls. Be careful of what you harbor inside your heart. what you feed is what you become. There's darkness and light inside of all of us.  it's the one we feed that grows and becomes more powerful and consuming. then we start seeing our spouse as the enemy.  What are u doing to keep the enemy out ?