Seneca · Letter XCII.1
Disasters, losses, and wrongs touch virtue only as a cloud touches the sun. The sun continues to shine; virtue continues to be virtue. The cloud cannot reach what lies above it.
What this means
Losses and wrongs, Seneca says, pass over virtue the way a cloud passes over the sun: they obscure nothing essential and reach nothing above them. The sun keeps shining; character keeps being character. Misfortune can darken your circumstances without touching what makes you good.
On fate, judgment, change.