Miklós Bánffy said this quote

“ A man's character is only formed after the impressions of childhood and early youth have become blended with the indefinable and hidden influences both atavistic and of more immediate heredity. When, like soft clay, the newborn human spirit has been first fashioned by the firm hand of the modeller and then allowed to set and harden, this is the moment of the final character emerges, fixed for life. While the part played by heredity will always remains elusive and uncertain, the influence of a man's early years are not difficult to unfurl if we know where to seek and consider seriously what we find. ”