Light the lamp-chains at every one of your doors; and all alone, conceal the darkness of your heart.

This couplet encourages us to always show a bright and welcoming face to the world, much like lighting lamps at every doorway. It suggests that while we present an outward display of joy and light, we should bravely face our personal struggles and internal darkness on our own. It's about finding strength within ourselves to manage our inner turmoil, without burdening others, and still illuminating our path for everyone to see. This way, we radiate positivity while quietly navigating our challenges.