"Ignorance sheer ignorance. There is no confidence to equal it. It's only when you know something about a profession that you are timid or careful."

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Basically, if the mind stays in the present, it's impossible to worry. Upon careful consideration, it becomes clear that human beings are capable of worrying only about an event that has already transpired or one that may take place in the future (although the occurrence might have just happened or may be about to happen in the next instant). The present moment contains no time or space for worry.

— H. E Davey