NASA astronauts have only managed to live continuously on the International Space Station (ISS) for a year and Biosphere 2 on Earth failed at two years of uninterrupted human habitation. Both cases required extracting the sickened people from the toxic environments. At this point it is ludicrous to talk about a permanent manned base on Mars.

— Steven Magee

When a subject becomes totally obsolete we make it a required course.

— Peter Drucker

Sometimes doing your best is not good enough. Sometimes you must do what is required.

— Winston S. Churchill

We can only be enlightened to the meaning of wise words only and only if life have put and made us requiring them.

— Toba Beta

I have had all of the disadvantages required for success.

— Larry Ellison

Thoughts have creative energy exhilaration is required to creates dissolves and recreates.

— Kishore Bansal

Facts are always required to draw conclusions and make serious decisions.

— Sunday Adelaja