Try not to become a man of success but rather to become a man of value.

Everything that is really great and inspiring is created by the individual who can labor in freedom.

Common sense is the collection of prejudices acquired by age eighteen.

Everything should be made as simple as possible, but not one bit simpler.

The significant problems we have cannot be solved at the same level of thinking with which we created them.

Not everything that can be counted counts, and not everything that counts can be counted.

When you look at yourself from a universal standpoint, something inside always reminds or informs you that there are bigger and better things to worry about.

You see, wire telegraph is a kind of a very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, they receive them there. The only difference is that there is no cat.
The hardest thing in the world to understand is the income tax.