Acquiring knowledge is the most fruitful effort.

Concerning mistakes, follow three simple rules. Firstly, correct a mistake that you made whenever it is possible. Secondly, don't repeat the same mistakes. Thirdly, learn from past mistakes.

The development of human civilization over the course of millennia was really fascinating. Let us imagine, however, how high a level of development could have been reached if all amazing ideas of the great minds of the past had been realized. Let us consider, for example, some ideas of Nikola
Tesla that have not been implemented as of yet.

The people who overcome their fears are the ones who can achieve their dreams.

A man's vanity often goes hand in hand with his lack of knowledge.

Knowledge illuminates any problem.