=> Don't ever had any negative thinking to God although something bad was happened to you. because maybe it's a better/the best things for your life now and later. because God is the only one who can know what will happen in the future. so just believe it
=> when you pray, don't ever ask the best things just depends on your willing. it will be better if you ask the best one depends on God's
. the reason is same as in the 1st point