Question

It was _____ who said, "to be human means to have inferiority feelings. but in the mentally healthy person this inferiority feeling acts as a motive for productivity, as a motive for attempting to overcome obstacles, to maintain oneself in life."

Answer 1

I believe the answer is: Alfred adler
Alfred adler was a Austrian doctor and psychoterapist who is regarded as the founder of the school of individual psychology.
He argued that the feeling of inferiority is a crucial element in human development because it motivate us to make necessary effort to bring positive results in our life.