"Jesus declared, "I am the bread of life. He who comes to me will never go hungry, and he who believes in me will never be thirsty. But as I told you, you have seen me and still you do not believe. All that the Father gives me will come to me, and whoever comes to me I will never drive away. For I have come down from heaven not to do my will but to do the will of him who sent me. And this is the will of him who sent me, that I shall lose none of all that he has given me, but raise them up at the last day. For my Father's will is that everyone who looks to the Son and believes in him shall have eternal life, and I will raise him up at the last day." John 6.35-40 (NIV)
Spurgeon, Evening 30th July:
No limit is set to the duration of this promise. It does not merely say, “I will not cast out a sinner at his first coming,” but, “I will in no wise cast out.” The original reads, “I will not, not cast out,” or “I will never, never cast out.” The text means, that Christ will not at first reject a believer; and that as he will not do it at first, so he will not to the last.
But suppose the believer sins after coming? “If any man sin we have an advocate with the Father, Jesus Christ the righteous.” But suppose that believers backslide? “I will heal their backsliding, I will love them freely: for mine anger is turned away from him.” But believers may fall under temptation! “God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it.” But the believer may fall into sin as David did! Yes, but he will “Purge them with hyssop, and they shall be clean; he will wash them and they shall be whiter than snow;” “From all their iniquities will I cleanse them.”
“Once in Christ, in Christ forever,
Nothing from his love can sever.”
“I give unto my sheep,” saith he, “eternal life; and they shall never perish, neither shall any man pluck them out of my hand.” What sayest thou to this, O trembling feeble mind? Is not this a precious mercy, that coming to Christ, thou dost not come to One who will treat thee well for a little while, and then send thee about thy business, but he will receive thee and make thee his bride, and thou shalt be his forever? Receive no longer the spirit of bondage again to fear, but the spirit of adoption whereby thou shalt cry, Abba, Father! Oh! the grace of these words: “I will in no wise cast out.”