I recommend to youth and to my own children as well, that they cultivate a certain basic attitude: when observing something, they should not regard it as complete, but should have the attitude, 'Everything I see can be improved,' and then ask themselves, 'Can I better the quality or condition?'.
(Manfred von Ardenne, German scientist)

Nothing is more dangerous than an idea when it is the only one you have.
(Émile Chartier)

If you don´t expect the unexpected you will not find it, for it is not to be reached by search or trial.
(Heraclitus)

"Inventive Thinking may simply mean the realization that there´s no particular virtue in doing things the way they have always been done.
(Rudolph Flesch)

The greatest reward a child achieves for learning, is doing something with what she/he has learned, using it to think and to behave creatively.
(Paul Torrance)

I never did anything worth doing by accident, nor did any of my inventions come about totally by accident; they came by hard work. Everything comes to him who hustles while he waits...
(Thomas Alva Edison)

Go ahead and do it.  Don't ask!  It's much easier to apologize than ask permission.  You can't afford to wait.
(Grace Hopper, American woman inventor, pioneer in computer software)

Creativity knows no frontiers, no gender and no age.
(Farag Moussa, Honorary President of the International Federation of
Inventors Associations - IFIA)

The four main dimensions of creative thinking are:
Fluency: ease with producing ideas.
Flexibility: ease with modifying and adapting ideas.
Originality: the freshness or novelty of ideas.
Elaboration: expanding and detailing ideas.