How did the speaker feel when his father asked him to help cut grass?

My father woke me up early one morning when I was fourteen and announced "Get up! You are going with me to cut grass." I felt proud and excited because my father thought I was responsible enough to help him in his business. Still, that first day was very hard. From sunrise to sunset, my father, my younger brother and I cut very large yards in well-to-do part of the city. By the end of the day I was exhausted, but I felt good. I put out a hard day’s labor and earned six dollars. One day, my father spotted some weeds I had missed cutting and pulled me inside. "Cut that section again!" he said firmly. "And don’t make me have to tell you again." The message was very-clear. Today I stress the importance of doing the job right the first time. Every job I have helped, from cutting lawns to washing dishes to working a machine on the construction site, I have learned something that help me in my next job. If you work hard enough, you can learn from any job you do.