Modern psychology teaches that experience is not merely the best teacher, but the only possible teacher.. There is no war between theory and practice. The most valuable experience demands both, and the theory should supplement the practice and not precede it.

Obsolescence is a factor which says that the new thing I bring you is worth more than the unused value of the old thing.

I am not interested in the past. I am interested in the future, for that is where I expect to spend the rest of my life.

The person who doesn't know something can't be done will often find a way to go ahead and do it.

Don't be afraid to stumble. Any inventor will tell you that you don't follow a plan far before you strike a snag. If, out of 100 ideas you get one that works, it's enough.

here is a great difference between knowing a thing and understanding it. You can know a lot and not really understand anything.

It doesn't matter if you try and try and try again, and fail. It does matter if you try and fail, and fail to try again.