To read the Bible is of itself a laudable occupation and can scarcely fail of being a useful employment of time; but the habit of reflecting upon what you have read is equally essential as than of reading itself, to give it all the efficacy of which it is susceptible.
We should not look back unless it is to derive useful lessons from past errors, and for the purpose of profiting by dearly bought experience.
Books are as useful to a stupid person as a mirror is useful to a blind person.
Happiness doesn't come from being rich, nor merely from being successful in your career, nor by self-indulgence. One step towards happiness is to make yourself healthy and strong while you are a boy so that you can be useful and so you can enjoy life when you are a man.
When you can't do something truly useful, you tend to vent the pent up energy in something useless but available, like snappy dressing.
Parenting is not giving your child everything they want. Parenting is not being your child's friend. Parenting is about preparing your child to be a useful and respectful person in society.
The idea of copyright did not exist in ancient times, when authors frequently copied other authors at length in works of non-fiction. This practice was useful, and is the only way many authors' works have survived even in part.
Useful — quotes and aphorisms
The trust of the innocent is the liar's most useful tool.
Economics is extremely useful as a form of employment for economists.
Technology is a useful servant but a dangerous master.