We shouldn't live in fear because God is greater than all things. Fear can kill us physical and spiritually too, it can dim our lights and we will always falter and fall.
Peter had the courage to walk on the sea to meet Jesus but once he started thinking about how vast the sea is and how scary the tides are rumbling, he panicked, he feared and he almost drowned if not for the saviour. We should always be brave and courageous.
Thanks for your message @onos-steve