I know that God works all things for my best, but........ things just never seem to work out for me.
I know that God is good, but........ only to other people.
I know I can do all things through Christ who gives me strength, but.... I don't really think that applies to me.
Pay attention to the words that come to your mind after that sneaky little word "but." This is how you can tell what you truly believe.
Don't let your thought life drift along with the natural current of the world's patterns. Be intentional to make your thoughts line up with God's truth.
The Bible clearly teaches us what we are supposed to think about.
Whatever is true, whatever is honorable, whatever is right, whatever is pure, whatever is lovely, whatever is of good repute, if there is any excellence and if anything worthy of praise, dwell on these things. Philippians 4:8
The fact that we are given this instruction shows that we don't have to be captives or victims to our minds, but that we are powerful to decide which direction our mind goes in.
Once you start to realize what your true belief system is, you can start to cooperate with Holy Spirit to transform your thought processes.
And do not be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what the will of God is, that which is good and acceptable and perfect. Romans 12:2