Keep your mind open to change all the time. Welcome it. Court it. It is only by examining and reexamining your opinions and ideas that you can progress.
Check up each week on the progress you are making. Ask yourself what mistakes you have made, what improvement, what lessons you have learned for the future.
Almost all the progress ever made in human thought has been made by the Doubting Thomas's, the questioners, the challengers, the show-me crowd.
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