What does walking in darkness mean for a believer?

When Isaiah speaks of those who fear the Lord yet walk in darkness, it indicates that believers, although loved and chosen by God, may face seasons of doubt, despair, or spiritual dryness. This does not define their permanent state but reflects the ebb and flow of their spiritual journey. Even in these moments, believers are urged to trust in the Lord and rely on His promises. The overarching message is that despite our struggles, God remains faithful, and His grace is sufficient to uphold us through any trial, reminding us of our need for continual dependence on Him.