Galatians 3:3 Are ye so foolish? Having begun in the Spirit, are ye now made perfect in the flesh?
Trying to make things happen on your own without God's help is foolish and often causes feelings of frustation and condemnation. It makes no sense for you to try to do what only God can do.
God wants yo to realize it is impossible for you to change yourself -- only He can do that through the marvelous wonder of His grace, which is a free gift to everyoone who will receive it.
If you have been struggling to achieve good results on your own it's time to make a change. God wants you to struggle less and believe more. Accept the free gift of God's grace and allow Him to change your life into the peaceful, abundant life He has planned for you.