Make the work harder for the men so they will keep at it and pay no attention to lying words!"

A relative offended is harder to reach than a strong city, and disputes are like the barred gates of a fortified citadel.

I have made your forehead harder than flint -- like diamond! Do not fear them or be terrified of the looks they give you, for they are a rebellious house."

For this reason the Jewish leaders were trying even harder to kill him, because not only was he breaking the Sabbath, but he was also calling God his own Father, thus making himself equal with God.

But by the grace of God I am what I am, and his grace to me has not been in vain. In fact, I worked harder than all of them -- yet not I, but the grace of God with me.