This exchange actually takes place between the Clown and the Old Shepherd in 3.3.102-106:
Old Shepherd: Heavy matters, heavy matters. But look thee here, boy. Now bless thyself. Thou mests with things dying. I with things new-born. Here's a sight for thee. Look thee, a bearing cloth for a squire's child.
the correct cite is 'thou mat'st with the things dying, and I do well with things newborn, and the calf in which dies upon summer is thou'st time's renewed.'