Concerning this salvation, the prophets sought and searched diligently, who prophesied of the grace that would come to you,

 (i) He tells them to gird up the loins of their mind This is a deliberately vivid phrase. In the east men wore long flowing robes which hindered fast progress or strenuous action. Round the waist they wore a broad belt or girdle; and when strenuous action was necessary they shortened the long robe by pulling it up within the belt in order to give them freedom of movement. The English equivalent of the phrase would be to roll up one's sleeves or to take off one's jacket. Peter is telling his people that they must be ready for the most strenuous mental endeavour. They must never be content with a flabby and unexamined faith; they must set to and think things out and think them through. It may be that they will have to discard some things. It may be that they will make mistakes. But what they are left with will be theirs in such a way that nothing and nobody can ever take it away from them. 