Accept the Truth that as a child of God you are never alone. Remember and meditate on Moses the leader, Elijah the prophet, Esther the foreign princess, David the shepherd boy, Shadrach Meshach and Abednego in the fiery furnace... and Jesus in the wilderness. They all knew the Truth that they were never alone and that God was with them in all things and at all times. It is acceptance of the lie from the devil "that you are alone" that makes us dangerously vulnerable to his evil plans and harmful devices. It is the acceptance of the Truth - that God never leaves or abandons His children despite how we feel, what we have or don't have, or who stands with us or against us - that keeps us safe inside the impenetrable fortress of His unbending and unchanging promises. Like His character, God's promises to His children never waver or fade and He promises to never abandon His own.
[ Hebrews 13:6 "So we say with confidence The Lord is my helper, I will not fear, what can man do to me?" ]