Believing that soom good can be derived from every event is a better preposition than that everything happens for the best, which is assuredly does not.
We cannot always control our thoughts, but we can control our words, and repetitionimpresses the subconscious, and we are then master of the situation.
Talk back to your internal critic. Train yourself to recognize and write downcritical thoughts as they go through your mind. Learn why these thoughts areuntrue and practice talking and writing back to them.