'A lancet' signifies truth.

(References: Arcana Coelestia 2799)

7085. Now since love is the source of a person's life, and his entire personality is determined by the nature of his love, and since in addition love implies spiritual togetherness, it follows that all in the next life form communities in accordance with the kinds of things they love; for everyone's life, that is, his love, follows him. Those governed by love towards the neighbour and love to God form communities in heaven, and those governed by self-love and love of the world form communities in hell; for self-love is the opposite of love to God, and love of the world is the opposite of love towards the neighbour.