si cum peditibus currens laborasti quomodo contendere poteris cum equis cum autem in terra pacis secura fueris quid facies in superbia Iordanis
If thou hast run with the footmen, and they have wearied thee, then how canst thou contend with horses? and if in the land of peace, wherein thou trustedst, they wearied thee, then how wilt thou do in the swelling of Jordan?