It is only necessary to have courage for strength without self-confidence is useless.
Computers are useless. They can only give you answers.
Worry is a useless mulling over of things we cannot change.
The most useless are those who never change through the years.
A car is useless in New York essential everywhere else. The same with good manners.
The monarchy is foremost a business and it's important to them that the British public continue to finance the excessive luxurious lifestyles of the now quite enormous wasteful and useless 'royal' family. I find it very sad.
In the modern world of business it is useless to be a creative original thinker unless you can also sell what you create.
Just because something doesn't do what you planned it to do doesn't mean it's useless.
When one is trying to do something beyond his known powers it is useless to seek the approval of friends. Friends are at their best in moments of defeat.
Passion is universal humanity. Without it religion history romance and art would be useless.