Play is the highest form of research. - Albert Einstein

"Gravitation is not responsible for people falling in love."

"We know from daily life that we exist for other people first of all, for whose smiles and well-being our own happiness depends."

"The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives."

"I speak to everyone in the same way, whether he is the garbage man or the president of the university."

"The important thing is not to stop questioning. Curiosity has its own reason for existing."