UnScramble this Word: a i a s e t l b?

Questions

Who proved Fermat's Last Theorem?

Who said 'If you want something said, ask a man. If you want something done, ask a woman.'?

Who said 'The no-mind not-thinks no-thoughts about no-things'?

Who said 'Everything must either be or not be, whether in the present or in the future'?

Who said 'Give me a firm place to stand and I will move the Earth'?