The greatest obstacle to discovery is not ignorance -- it is the illusion of knowledge.

The greatest obstacle to discovery is not ignorance -- it is the illusion of knowledge.

The greatest obstacle to progress is prejudice.

The greatest obstacle to progress is prejudice.

All the adversity I've had in my life, all my troubles and obstacles, have strengthened me... You may not realize read more

All the adversity I've had in my life, all my troubles and obstacles, have strengthened me... You may not realize it when it happens, but a kick in the teeth may be the best thing in the world for you.

A good intention but fixed and resolute - bent on high and holy ends, we shall find means to them read more

A good intention but fixed and resolute - bent on high and holy ends, we shall find means to them on every side and at every moment; and even obstacles and opposition will but make us "like the fabled specter-ships," which sail the fastest in the very teeth of the wind.

Life's up and downs provide windows of opportunity to determine your values and goals - Think of using all obstacles read more

Life's up and downs provide windows of opportunity to determine your values and goals - Think of using all obstacles as stepping stones to build the life you want

The block of granite which was an obstacle in the pathway of the weak becomes a stepping-stone in the pathway read more

The block of granite which was an obstacle in the pathway of the weak becomes a stepping-stone in the pathway of the strong

Stand up to your obstacles and do something about them. You will find that they haven't half the strength you read more

Stand up to your obstacles and do something about them. You will find that they haven't half the strength you think they have.

Those who commence deliberately. They plod on. They stick to it. They persevere and finally reap their rewards.

Those who commence deliberately. They plod on. They stick to it. They persevere and finally reap their rewards.

The dogmas of the quiet past are inadequate to the stormy present. The occasion is piled high with difficulty, and read more

The dogmas of the quiet past are inadequate to the stormy present. The occasion is piled high with difficulty, and we must rise with the occasion. As our case is new, so we must think anew and act anew.