That evening, my dad comes home from work, driving a taxi, looks at the sign - at me - at the auto parts, and says "what's that son?" Me "that is my business, dad! I am going to sell auto parts and help you and mom out!" My dad looks at my eyes and says "Boy, you are a damn fool"
And THAT was my motivation. Because I decided that I will make my auto parts store a big success, And I would make my Dad EAT-HIS-WORDS! From that table, I now own 85 parts stores today.
Bottom line, you can be motivated in a positive way, or in a negative way. Then YOU decide what you want to do. No matter what others say to you. I, personally, from that day, motivate myself. No matter what others say to me.