I don't want plans to change
Blessed are those whose ways are blameless, who walk according to the law of the Lord.
Blessed are those who keep his statutes and seek him with all their heart—they do no wrong but follow his ways. You have laid down precepts that are to be fully obeyed. (Proverbs 119:1-4)
The Word of God is nothing to be trifled with. In fact, we are to revere it, frequent its passages, and use its wisdom to help us in our daily lives. If we desire to make wise choices, we need wisdom. We gain wisdom when we seek it. We seek well when it is with our whole heart. We seek best when we seek him first above all earthly wisdom.
Full obedience seems like a hard thing at times simply because we don't take the time to really get to know him. We cannot encounter God without feeling some sense of "inadequacy". He is a holy God and he desires for us to produce actions that reveal our heart's desire to live holy lives. There are times when our actions reveal other intentions, but that is when we need God's help to bring the wisdom he gives alive within us.
We will all likely live according to our own devices on occasion, but his plan is for us to allow him to establish our actions. We don't do this without guidance from his Word. Obedience is only willpower until his Spirit innervates our actions. We connect with him and then he begins to remake our plan. Do we always want a plan to change? No, but he knows when the ones we have created will do us more harm than good! Just sayin...