33 Teach me, O LORD, to follow your decrees;
then I will keep them to the end.
34 Give me understanding, and I will keep your law
and obey it with all my heart.
35 Direct me in the path of your commands,
for there I find delight.
36 Turn my heart toward your statutes
and not toward selfish gain.
37 Turn my eyes away from worthless things;
preserve my life according to your word.[a]
38 Fulfill your promise to your servant,
so that you may be feared.
39 Take away the disgrace I dread,
for your laws are good.
40 How I long for your precepts!
Preserve my life in your righteousness.
We have to be taught to follow His decrees.
We have to be given understanding to keep His law.
We have to be directed to follow His commands.
He has to turn our hearts towards His statues and away from selfish gain, and our eyes from worthless things to His Word.
It simply is not up to us.
Personally, I am ever so thankful for that. I could never do it. But God? Yeah, I trust Him. He can do anything!