According to it, he was born when his father was 70 years old, and as he was of delicate health by nature, the people said that he would not be able to live no more than 20 years, then his father thought that he would rather sustain the life 'selling the salt' (with a small profit without seed money).
それによると、自分は父70歳のときの子で、生来ひ弱くて20歳まで生きられまいと言われたので、塩売りでもやろうと父は思った。