Screw your courage to the sticking-place

Fight till the last gasp.

He which hath no stomach to this fight, let him depart, his passport shall be made and crowns for convoy put into his purse. We would not die in that man's company that fears his fellowship, to die with us.

He is as full of valor as of kindness. Princely in both.

To be furiousIs to be frightened out of fear.

Fear cuts deeper than swords.