Being obedient to the will of God is essential to our spiritual life, and also to our physical life.
If you are not obedient to God's will, then You are against God purpose in your life. God needs you to always obey His commandments because his commandments are light.
There is no life without God, certainly none. If you love by obedient, then you love him. It will is only the people that loves the lord, stays I obedient.
Obedience gives access to God's life in us. Because when we obey, we love. And the scripture says that if we obey and keep his commandments, The son and the father will come in to duel with us and to make our heart their duelling place.
Nothing shows that you love God, than being in obedience.