The tongue is a part of our body that can do good or cause harm. How we use our tongue is up to us. We can choose to build or tear down, and the power of words is often highly underestimated.
This is something that can be viewed in two ways. The first way is that you have the ability to keep your relationship strong by using your tongue to build up your spouse. You can do this by telling him how much you love him, or by telling him how proud you are of him.