Nothing in the world can take the place of Persistence. The desire and ability to press on has and always will solve the problems of the human race and divide those who achieve from those who might have been.

The slogan 'press on' has solved and always will solve the problems of the human race.

Just because you believe something was true in the past does not mean it will be true in the future.

When your back is against the wall, you will find it is a good place to push off.

Every revolution begins with one voice crying in the wilderness.

Fear is caused by the uncertainty of the future. Sorrow is caused by the remembrance of the past. Try to keep your thoughts in the present, for the future we will never know and the past we may never understand.