Ikan, I like how you described the miraculous nature of the thief's conversion. He embarked upon the process of conversion, of course, when he first encountered Jesus. His conscience was pricked, but he denied the testimony of the Spirit and stepped up his perilous path fighting against the hated Romans, and fighting against his pricking conscience. But all the while he was being drawn to Jesus.

DA 749, 750
To Jesus in His agony on the cross there came one gleam of comfort. It was the prayer of the penitent thief. Both the men who were crucified with Jesus had at first railed upon Him; and one under his suffering only became more desperate and defiant. But not so with his companion. This man was not a hardened criminal; he had been led astray by evil associations, but he was less guilty than many of those who stood beside the cross reviling the Saviour. He had seen and heard Jesus, and had been convicted by His teaching, but he had been turned away from Him by the priests and rulers. Seeking to stifle conviction, he had plunged deeper and deeper into sin, until he was arrested, tried as a criminal, and condemned to die on the cross. In the judgment hall and on the way to Calvary he had been in company with Jesus. He had heard Pilate declare, "I find no fault in Him." John 19:4. He had marked His godlike bearing, and His pitying forgiveness of His tormentors. On the cross he sees the many great religionists shoot out the tongue with scorn, and ridicule the Lord Jesus. He sees the wagging heads. He hears the upbraiding speeches taken up by his companion in guilt: "If Thou be Christ, save Thyself and us." Among the passers-by he hears many defending Jesus. He hears them repeat His words, and tell of His works. The conviction comes back to him that this is the Christ. Turning to his fellow criminal he says, "Dost not thou fear God, seeing thou art in the same condemnation?" The dying thieves have no longer anything to fear from man. But upon one of them presses the conviction that there is a God to fear, a future to cause him to tremble. And now, all sin-polluted as it is, his life history is about to close. "And we indeed justly," he moans; "for we receive the due reward of our deeds: but this Man hath done nothing amiss." {DA 749.3}

There is no question now. There are no doubts, no reproaches. When condemned for his crime, the thief had become hopeless and despairing; but strange, tender thoughts now spring up. He calls to mind all he has heard of Jesus, how He has healed the sick and pardoned sin. He has heard the words of those who believed in Jesus and followed Him weeping. He has seen and read the title above the Saviour's head. He has heard the passers-by repeat it, some with grieved, quivering lips, others with jesting and mockery. The Holy Spirit illuminates his mind, and little by little the chain of evidence is joined together. In Jesus, bruised, mocked, and hanging upon the cross, he sees the Lamb of God, that taketh away the sin of the world. Hope is mingled with anguish in his voice as the helpless, dying soul casts himself upon a dying Saviour. "Lord, remember me," he cries, "when Thou comest into Thy kingdom." {DA 750.1}

Quickly the answer came. Soft and melodious the tone, full of love, compassion, and power the words: Verily I say unto thee today, Thou shalt be with Me in paradise. {DA 750.2}

The thief experienced the process of conversion just like Jesus described it to Nicodemus:

DA 172
The wind is heard among the branches of the trees, rustling the leaves and flowers; yet it is invisible, and no man knows whence it comes or whither it goes. So with the work of the Holy Spirit upon the heart. It can no more be explained than can the movements of the wind. A person may not be able to tell the exact time or place, or to trace all the circumstances in the process of conversion; but this does not prove him to be unconverted. By an agency as unseen as the wind, Christ is constantly working upon the heart. Little by little, perhaps unconsciously to the receiver, impressions are made that tend to draw the soul to Christ. These may be received through meditating upon Him, through reading the Scriptures, or through hearing the word from the living preacher. Suddenly, as the Spirit comes with more direct appeal, the soul gladly surrenders itself to Jesus. By many this is called sudden conversion; but it is the result of long wooing by the Spirit of God,--a patient, protracted process. {DA 172.3}

I think of a defective character as a character which has defects. For example, if one view God's character in a false light and presented it that way, that would be a defect of character. One can have defects in one character without being aware of it.

A defect is an imperfection or blemish. Character has to do with one's feelings, thoughts, words and actions. So if one habitually speaks, thinks and acts imperfectly, that's a defect of character.

Regarding the other point or points you wanted me to respond to, I don't know what they are.

The ministers are not to carry into their sacred office their own defective spirits and faulty characters; for in all things they are to fulfill the word, and be found approving themselves "as the ministers of God." {RH, November 20, 1894 par. 2}