Possibly correction or guidance.
Proverbs 22:15 (KJV) Foolishness is bound in the heart of a child; but the rod of correction shall drive it far from him.
Proverbs 10:13 (KJV) In the lips of him that hath understanding wisdom is found: but a rod is for the back of him that is void of understanding.
- Rod and staff used for Jesus’ renewing our our souls (teaching/shepherding our souls).
Psalms 23:1-4 (KJV) The LORD is my shepherd; I shall not want… He restoreth my soul… thy rod and thy staff they comfort me.
- According to Goliath, dogs (fools) need staves (the rod of a shepherd).
1 Samuel 17:43 (KJV) And the Philistine said unto David, Am I a dog, that thou comest to me with staves [staffs]? And the Philistine cursed David by his gods.