The best Quotations

Do you know the writers of the following quotations?

Quotation The mere apprehension of a coming evil has put many into a situation of the utmost danger. - writer
Quotation Nothing is so easy to fake as the inner vision. - writer
Quotation There are three things extremely hard: steel, a diamond, and to know one's self. - writer
Quotation Artists use frauds to make human beings seem more wonderful than they really are. Dancers show us human beings who move much more gracefully than human beings really move. Films and books and plays show us people talking much more entertainingly than people. - writer
Quotation No one can make you feel inferior without your consent. - writer
Quotation The poet speaks to all men of that other life of theirs that they have smothered and forgotten. - writer