Do one thing many times

When it begin ?I don't know.But i come to do a thing only once.Because i think it is repeat to do a thing twice ,and there has no value to do it .So if i have read the book,will not read it for the second time;And if i have said a word,will not said it for the second time too.And so,i don't learn the knowledge on the book in the heart,and can not well memorize the word.
Sometime, the technology will not contain in the taste. To the opposite, the more you do it ,there are more technology will be appear you would find.Although the world has much interesting,but you can't do all the things in the short life.In fact, one person can do one thing in the short life time is enough.