It's hard to walk, talk, think and act positive all the time but the more you do it, the more you think it's normal and the quicker you'll change your life. You'll start intimidating people around you who have low self esteem but that's not your problem. Their low self esteem is their problem to fix like you're fixing yours. You're here to win, achieve and succeed in life without violating the rights of others whether people support you or not. 

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Walk, talk, think and act with a positive mental attitude and watch what happens.