Courage, intellect, all the masterful qualities, serve but to make a man more evil if they are used merely for that man’s own advancement, with brutal indifference to the rights of others. It speaks ill for the community if the community worships these qualities and treats their possessors as heroes regardless of whether the qualities are used rightly or wrongly.

Theodore Roosevelt (1858-1919) American politician, statesman, conservationist, writer, US President (1901-1909)

Speech (1910-04-23), “Citizenship in a Republic [The Man in the Arena],” Sorbonne, Paris
    (Source)