A sheep is helpless unless it has a good shepherd. And if a sheep can say, "I’m safe and I know that I’m safe," the sheep's boasting, "I’ve got a good shepherd. I’ve got a wonderful shepherd." He says that He can keep you. Now it’s not a question whether I can hold on; it’s a question of whether He can hold on. And He says He can. And it’s a matter of trusting Him. You see, assurance of salvation rests upon the Word of God and it’s a question of whether you believe Him, whether you trust Him or not. It all rests upon that because He’s made it very clear that you have a sure salvation.