An idea isn't responsible for the people who believe it.
Don Marquis
Ideas can no more flow backward than can a river.
Victor Hugo
An idea that is not dangerous is unworthy to be called an idea at all.
Elbert Hubbard
Great ideas often receive violent opposition from mediocre minds.
Albert Einstein
A mediocre idea that generates enthusiasm will go further than a great idea that inspires no one.
Mary Kay Ash
The world moves, and ideas that were once good are not always good.
Dwight D. Eisenhower
The man with a new idea is a crank until the idea succeeds.
Mark Twain
Ideas are the root of creation.
Ernest Dimnet
The only force that can overcome an idea and a faith is another and better idea and faith, positively and fearlessly upheld.
Dorothy Thompson
Daring ideas are like chessmen moved forward. They may be beaten, but they may start a winning game.
Johann Wolfgang von Goethe
A fresh mind keeps the body fresh. Take in the ideas of the day, drain off those of yesterday. As to the morrow, time enough to consider it when it becomes today.
Edward G. Bulwer-Lytton
First comes thought; then organization of that thought, into ideas and plans; then transformation of those plans into reality. The beginning, as you will observe, is in your imagination.
Napoleon Hill