"And without faith it is impossible to please God..." Hebrews 11:6.
Why is faith so important to God? Because faith is simply agreement with God.
Faith, or lack thereof, can be seen in two ways:
(1) Faith means to be in agreement with God
(2) Lack of faith means to be in disagreement with God
And as with anyone, who likes someone who is at odds with them? Particularly, if you are the Almighty. What mere mortal dares to argue with You?
God is pleased when we believe (have faith, i.e., are in agreement with) His word. He is pleased when we believe in His love for us. He is pleased when we believe the wonderful destiny He planned for our lives.
1 Corinthians 2:9 says,
"No eye has seen, no ear has heard, and no mind has imagined what God has prepared for those who love Him."
And Psalm 139:16 says,
"Your eyes saw my unformed substance, and in Your book all the days [of my life] were written before ever they took shape... ."
Therefore, start anew in pleasing God.
Remember, it is impossible to please Him if you do not agree with what He says.
Accordingly, study His word and begin agreeing with all of the glorious promises we have through Jesus Christ.