Romano Guardini said this quote
“ It is also said that the sheep heed the Shepherd, because they know his voice. Is it true that men recognize Christ's call and respond to it? In one sense it must be, for he has said so; yet much in me qualifies the statement. Actually I respond much more readily to the call of 'the others'; I neither really understand Christ's summons nor follow it. Therefore, in order that I may hear, he must not only speak, but also open my ears to his voice. Part of me, the profoundest part, listens to it, but superficial, loud contradiction often overpowers it. The opponents with whom God must struggle in order to win us are not primarily ‘the others,’ but ourselves; we bar his way. The wolf who puts the hireling to flight is not only outside; he is also within. We are the arch-enemy of our own salvation, and the Shepherd must fight first of all with us – for us. ”