John 10:1-6.
Jesus shows us in these verses that there are two ways to approach life; one is to listen to the voice of the one who comes to us through honest and favourable means; the other is to listen to the one who comes in via some other, less than honourable way. The examples used includes a watchman (the “gate-keeper”), the shepherd and the thief/robber/stranger (the choice of who to listen to and follow) and the sheep (those needing to decide who to listen to and follow).
How good are we at filtering out all other “voices” that try to speak into our lives, and instead remain completely and consistently fixed on Jesus?