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

If you cannot solve a problem, ask someone who knows.

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.

Knowledge illuminates any problem.

Superficial knowledge is potentially more dangerous than ignorance. It gives a false sense of security encouraging an ignorant man to persevere in his efforts that can result in huge damage.

A wise man is humble, knowing he actually doesn't know much.