"Believe that you have it, and you have it."
"The person who says it cannot be done, should not interrupt the person doing it"
"Do not pray for an easy life, pray for the strength to endure a difficult one."
"Nothing is permanent, except change"
"Smooth seas do not make skillful sailors"
"The future depends on what we do in the present."
"You must be the change you wish to see in the world."
"It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow."
Robert H. Goddard
"Our imagination is the only limit to what we can hope to have in the future."
Charles F. Kettering
"Only passions, great passions, can elevate the soul to great things."
"Happy are those who dream dreams and are ready to pay the price to make them come true."
Leon J. Suenes
"For hope is but the dream of those that wake."
"The only way of finding the limits of the possible is by going beyond them into the impossible."
Arthur C. Clarke
"There is no failure except in no longer trying."
"Failure comes only when we forget our ideals and objectives and principles."