Re: Nothing but the blood of Jesus..

Hebrews 9:12
Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.

This eternal redemption obtained by Jesus, by his blood, is not a possibility, it's a guarantee for those that are in Christ through faith, and for those that will be brought in Christ through faith (that are not yet in the fold).

John 10:
14I am the good shepherd. I know my own and my own know me, 15just as the Father knows me and I know the Father; and I lay down my life for the sheep. 16And I have other sheep that are not of this fold. I must bring them also, and they will listen to my voice. So there will be one flock, one shepherd.

John 6:
35Jesus said to them, “I am the bread of life; whoever comes to me shall not hunger, and whoever believes in me shall never thirst. 36But I said to you that you have seen me and yet do not believe. 37All that the Father gives me will come to me, and whoever comes to me I will never cast out. 38For I have come down from heaven, not to do my own will but the will of him who sent me. 39And this is the will of him who sent me, that I should lose nothing of all that he has given me, but raise it up on the last day. 40For this is the will of my Father, that everyone who looks on the Son and believes in him should have eternal life, and I will raise him up on the last day.”