She hath done what she could. She seized the opportunity, which might not occur again, of doing honor to her Lord by anointing him with her very best. Our Lord might have excused this action, and have praised it as a practical evidence of her gratitude, her humility, and her love for him.
But instead of dwelling on these things, he said, She hath anointed my body aforehand for the burying. Our Lord here, of course, alludes to the spices and ointments with which the Jews wrapped up the bodies of their dead before their burial.
Not that this was what Mary intended. She could hardly have dreamed of his death and burial so near at hand. But she was moved by the Holy Spirit to do this, at this particular time, as though in anticipation of his death and burial.