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.

Whether you think you can or think you can't - you are right

Whether you think you can or think you can't - you are right

The authority of those who teach is often an obstacle to those who want to learn.

The authority of those who teach is often an obstacle to those who want to learn.

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.

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

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.

An obstacle is often an unrecognized opportunity

An obstacle is often an unrecognized opportunity

Obstacles are those frightful things you see when you take your eyes off your goal.

Obstacles are those frightful things you see when you take your eyes off your goal.

When you get right down to the root of the meaning of the word "succeed," you find that it simply read more

When you get right down to the root of the meaning of the word "succeed," you find that it simply means to follow through.