When God draws the sword of wrath, prophets and saints draw in their heads, but if he casts a look of grace, he converts wicked into virtuous men.

If at the resurrection he addresses us in anger
What chance of pardon will even prophets have?
Say: ‘Remove the veil from the face of mercy
Because sinners entertain hopes of pardon.’

Saadi Shirazi

http://www.poemhunter.com/poem/ch-08-on-rules-for-conduct-in-life-maxim-65/