Obedience is the practical acceptance of the authority and will of God. It includes both submitting to Him and then expressing that submission in actions, words and thoughts. To be obedient is to be in agreement with God. To be in agreement with God is to be in a position of power in Christ.
Disobedience is caused by rebellion and distrust of God. To be disobedient is to yield to self-will instead of surrendering to God and desiring His will in all things.
In Isaiah 1 verse 19, "If you are willing and obedient, you will eat the best from the land"

The Book Of John chapter 14 vs 15 also speaks about obedience;

"If you love me, you will obey what I command....Whoever has my commands, and obeys them he is the one who loves me. He who loves me will be loved by my Father, and I too will love him and show myself to him"