Be careful what you do when you can't see.
Sarai couldn't see the promised child so she gave Abram her servant girl to bear him a son.Elisha's servant couldn't see the horses and chariots of fire on their side so he panicked.
As Elisha prayed " open our eyes Lord so that we may see "
(Gen15:4 &16:2,2 Kngs 6:8-22)