“And he said unto Jesus, Lord, remember me when Thou comest into Thy kingdom. And Jesus said unto him, Verily I say unto thee, Today shalt thou be with Me in paradise.”- Luke 23:42-43

The story of the salvation of the dying thief is a standing instance of the power of Christ to save, and of His abundant willingness to receive all that come to Him, in whatever plight they may be. I cannot regard this act of grace as a solitary instance, any more than the salvation of Zacchaeus, the restoration of Peter, or the call of Saul, the persecutor. Every conversion is, in a sense, singular: no two are exactly alike, and yet any one conversion is a type of others. The case of the dying thief is much more similar to our conversion than it is dissimilar; in point of fact, his case may be regarded as typical, rather than as an extraordinary incident. 

Remember, beloved friends, that our Lord Jesus, at the time He saved this malefactor, was at His lowest. His glory had been ebbing out in Gethsemane, and before Caiaphas, and Herod, and Pilate; but it had now reached the utmost low-water mark. Stripped of His garments, and nailed to the cross, our Lord was mocked by a ribald crowd, and was dying in agony. Then was He “numbered with the transgressors,” and made as the offscouring of all things. Yet, while in that condition, He achieved this marvellous deed of grace. Behold the wonder wrought by the Saviour when emptied of all His glory and hanged up a spectacle of shame upon the brink of death! How certain is it that He can do great wonders of mercy now, seeing that He has returned unto His glory, and sitteth upon the throne of light! “He is able to save them to the uttermost that come unto God by Him, seeing He ever liveth to make intercession for them.” If a dying Saviour saved the thief, my argument is, that He can do even more now that He liveth and reigneth. All power is given unto Him in heaven and in earth; can anything at this present time surpass the power of His grace? ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/2078.cfm