As for courage and will - we cannot measure how much of each lies within us, we can only trust there will be sufficient to carry through trials which may lie ahead. Andre Norton
It will be sufficient to point to the enormous burdens which armaments place on the economic, social, and intellectual resources of a nation, as well as on its budget and taxes. Ludwig Quidde
A man must always live by his work, and his wages must at least be sufficient to maintain him. They must even upon most occasions be somewhat more; otherwise it would be impossible for him to bring up a family, and the race of such workmen could not last beyond the first generation. Adam Smith
Were not this desire of fame very strong, the difficulty of obtaining it, and the danger of losing it when obtained, would be sufficient to deter a man from so vain a pursuit. Joseph Addison
If Courtezans and Strumpets were to be prosecuted with as much Rigour as some silly People would have it, what Locks or Bars would be sufficient to preserve the Honour of our Wives and Daughters? Bernard Mandeville
It's clear that prevention will never be sufficient. That's why we need a vaccine that will be safe. Luc Montagnier