Learned a lot of valueable lessons in the mid 2000's working a skilled construction trade

I learned a lot in the mid 2000's about the competitive nature of life while working a skilled construction trade.
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Learned how hard you could work to make a buck, and how ruthless and tough people can be to hold positions of power even in that small little world.
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These lessons have not left me and will remain with me through out my life, I guess that is how wisdom is gained one experience at a time.