すべきことを、計画的に、心を決めてやってしまいなさい！やるべきことをやったことほど甲斐のあることも（他に）ない。
With the things that you need to do, make up your mind and finish them up deliberately! There is nothing as gratifying as having done the things you needed to do.
photo: 「Sea World」by Ricymar Photography from flickr