Cut bread into cubes. In a very large mixing bowl add bread , salt, pepper, & ground celery seed. Use hands to toss so that spices coat bread cubes. Melt 2 sticks of butter and slowly add it to the bread cubes till you can form a ball and it stays together. Add stuffing to the bird or place in a greased 13 X 9. If you choose to put stuffing into a 13 X 9 you will want to place a few basters full of broth from the bird to flavor it.