People become attached to their burdens sometimes more than the burdens are attached to them.
The moment we want to believe something, we suddenly see all the arguments for it, and become blind to the arguments against it.
Some men see things as they are and ask why. Others dream of things that never were and ask why not.
The power of accurate observation is frequently called cynicism by those who have not got it.
Progress is impossible without change, and those who cannot change their minds cannot change anything.