When we trust in God and walk under His will, we do well, because God is the one who cleans the way for us to walk without fear even though we pass through that dark valley, because the Lord takes us by the hand and walks with us.
We are sure that the Psalmist David was fully confident in Almighty God, in spite of all the enemies he had against him, who wanted to destroy him. But he was sure about something and it was that the Lord walked with him.
I will instruct you and teach you in the way you should go;
I will guide you with My eye.