"Give us of your oil; for our lamps are going out." (Margin.) But the waiting five, with their freshly trimmed lamps, have emptied their flagons. They have no oil to spare, and they answer, "Not so; lest there be not enough for us and you: but go ye rather to them that sell, and buy for yourselves."
Salvation is an individual preparation. I cannot receive the Holy Spirit for you, nor you for me. We must do it for ourselves. "Character is not transferable. No man can believe for another. . . . No man can impart to another the character which is the fruit of the Spirit's working. . . ." {AG 214.4}
Here is the concept from Amazing Grace:
Chap. 206 - Oil for Our Lamps
The wise took oil in their vessels with their lamps. Matt. 25:4. {AG 214.1}
The two classes of watchers [in the parable of the ten virgins] represent the two classes who profess to be waiting for their Lord. They are called virgins because they profess a pure faith. By the lamps is represented the Word of God. . . . The oil is a symbol of the Holy Spirit. . . . {AG 214.2}
In the parable, all the ten virgins went out to meet the bridegroom. All had lamps and vessels for oil. For a time there was seen no difference between them. So with the church that lives just before Christ's second coming. All have a knowledge of the Scriptures. All have heard the message of Christ's near approach, and confidently expect His appearing. But as in the parable, so it is now. A time of waiting intervenes, faith is tried; and when the cry is heard, "Behold, the Bridegroom cometh; go ye out to meet him," many are unready. . . . They are destitute of the Holy Spirit. Without the Spirit of God a knowledge of His Word is of no avail. The theory of truth, unaccompanied by the Holy Spirit, cannot quicken the soul or sanctify the heart. . . . Without the enlightenment of the Spirit, men will not be able to distinguish truth from error, and they will fall under the masterful temptations of Satan. . . . {AG 214.3}
The grace of God has been freely offered to every soul. . . . But character is not transferable. No man can believe for another. . . . No man can impart to another the character which is the fruit of the Spirit's working. . . . {AG 214.4}
We cannot be ready to meet the Lord by waking when the cry is heard, "Behold, the Bridegroom!" and then gathering up our empty lamps to have them replenished. . . . In the parable the wise virgins had oil in their vessels with their lamps. Their light burned with undimmed flame through the night of watching. . . . So the followers of Christ are to shed light into the darkness of the world. Through the Holy Spirit, God's word is a light as it becomes a transforming power in the life of the receiver. By implanting in their hearts the principles of His word, the Holy Spirit develops in men the attributes of God. The light of His glory--His character--is to shine forth in His followers. {AG 214.5}
Ask God to give you much of the oil of His grace. {AG 214.6}
And from the Great Controversy:
"While the bridegroom tarried, they all slumbered and slept." By the tarrying of the bridegroom is represented the passing of the time when the Lord was expected, the disappointment, and the seeming delay. In this time of uncertainty, the interest of the superficial and half-hearted soon began to waver, and their efforts to relax; but those whose faith was based on a personal knowledge of the Bible had a rock beneath their feet, which the waves of disappointment could not wash away. "They all slumbered and slept;" one class in unconcern and abandonment of their faith, the other class patiently waiting till clearer light should be given. Yet in the night of trial the latter seemed to lose, to some extent, their zeal and devotion.
The half-hearted and superficial could no longer lean upon the faith of their brethren. Each must stand or fall for himself. {GC88 394.1}
We can be sanctifying influences, encouraging individual to buy for themselves - but the oil is not transferable individual to individual.