F.F. Bruce on the Sayings of JesusThe Hard Sayings of Jesus (InterVarsity: 1983), p. 14.
I quickly found that the exposition of the hard sayings of Jesus is a difficult and responsible task; yet I am glad that I undertook it, for it has proved specially rewarding. His yoke is easy and his burden is light, but his sayings are often hard because they run counter to well-entrenched presuppositions and traditional assumptions about life and human relations. When they are hard for this reason, I hope I have not made them easier, for that would be to obscure their meaning.