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.
Onecomes to believe whatever one repeats to oneself sufficiently often, whetherthe statement be true or false. It comes to be dominating thought in one'smind.
We cannot always control our thoughts, but we can control our words, and repetitionimpresses the subconscious, and we are then master of the situation.
