look on the bright side
there is light at the end of the tunnel
These are things often said with the best of intentions, but can be impossible when trapped and lost in a deep hole of darkness. You can't see the light to find your way through, or feel its warmth to provide the energy to do so.
No one's light can shine alone in the darkness
There are individuals who remind us that there is light, those who reach out into the darkness like a soft flame and build a fire.
Don't ask others to look for the light, be the light. Don't be a light at the end of the tunnel, enter the tunnel of darkness and share your light with patience, persistence and kindness.