"If out of all mankind one finds a single friend, he has found something more precious than any treasure, since there is nothing in the world so valuable that it can be compared to a real friend"

"The only medicine for suffering, crime, and all the other woes of mankind, is wisdom"

"Three passions, simple but overwhelmingly strong, have governed my life: the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind"

"Here men from the planet Earth first set foot upon the Moon. July 1969 AD. We came in peace for all mankind"

"Our true nationality is mankind"

"The common behavior of mankind is the system of reference by means of which we interpret an unknown language"

"Mankind are more disposed to suffer, while evils are sufferable, than to right themselves by abolishing the forms to which they are accustomed"

"Music is the universal language of mankind"

"By a Carpenter mankind was made, and only by that Carpenter can mankind be remade"

"The law, which restrains a man from doing mischief to his fellow citizens, though it diminishes the natural, increases the civil liberty of mankind"

"At a time when science plays such a powerful role in the life of society, when the destiny of the whole of mankind may hinge on the results of scientific research, it is incumbent on all scientists to be fully conscious of that role, and conduct themselves accordingly"