so can sinful nature be gotten rid off before close of probation, or is it until second coming?

 Yes, according to the sources, the "sinful nature" and its accompanying tendencies can and must be changed and overcome before the close of probation and the second coming of Christ.

Here's a detailed breakdown from the sources:

• The Nature of the Sinful Condition and Its Origin: Man was originally created in God's image, pure and without corrupt principles or tendencies to evil. However, "by one man’s disobedience many were made sinners". Adam's "transgression" perverted human powers, replacing love with selfishness and weakening humanity's nature. This fallen state, often referred to as the "carnal mind" or "natural inclinations," is described as "enmity against God; for it is not subject to the law of God, neither indeed can be". This corrupted nature is the origin from which specific "transgressions" spring.

• The Necessity and Possibility of Change: Man cannot, by mere human effort, effect a radical change in himself; divine power is essential. "Our condition through sin has become preternatural, and the power that restores us must be supernatural, else it has no value". This transforming power is God's grace in Jesus Christ. Through the "new birth," the heart is "renewed by divine grace" and brought into harmony with God's law, restoring the "lost image of God". This "refining influence of the grace of God changes the natural disposition of man".

• The Timing of Complete Transformation: The sources are explicit that the complete overcoming of sinful nature and the perfection of character must occur before Christ's second advent and the close of probation:

  • No Post-Probation Purification: "When the Lord comes, those who are holy will be holy still... But those who are unjust, unsanctified, and filthy will remain so forever. No work will then be done for them to remove their defects and give them holy characters". "The Refiner does not then sit to pursue His refining process and remove their sins and their corruption. This is all to be done in these hours of probation. It is now that this work is to be accomplished for us".
  • No Second Probation: "There will be no future probation in which to prepare for eternity. It is in this life that we are to put on the robe of Christ's righteousness. This is our only opportunity to form characters for the home which Christ has made ready for those who obey His commandments". The idea of a "second probation" is called a "fatal delusion".
  • Judgement and Destiny Fixed: "The work of the investigative Judgment and the blotting out of sins is to be accomplished before the second advent of the Lord". "When the work of the investigative judgment closes, the destiny of all will have been decided for life or death. Probation is ended a short time before the appearing of the Lord in the clouds of heaven".
  • Character at Christ's Coming: "Just as Christ finds us in character when he comes, so we shall remain". "When He comes He is not to cleanse us of our sins, to remove from us the defects in our character, or to cure us of the infirmities of our tempers and dispositions". "Christ does not promise to transform our characters then, after He shall come".
  • The "He that is unjust, let him be unjust still" declaration: This declaration, found in Revelation 22:11, signifies the close of probation, after which there is no further opportunity for character change. Those who are not righteous or holy by that point will remain unrighteous and filthy.
  • Heaven Requires Perfection: "Without perfection of character no one can enter the pearly gates of the city of God, for if, with all our imperfections, we were permitted to enter that city, there would soon be in heaven a second rebellion". "One spot, one wrinkle, one defect in the character, will forever debar them from heaven". We must be "without spot, or wrinkle, or any such thing".

• The Process of Sanctification: A Lifelong Effort Culminating in Perfection:

  • Sanctification is described as "not the work of a moment, an hour, a day. It is a continual growth in grace". It is "the work of a lifetime".
  • It involves "constant watchfulness and prayer" and "persevering efforts".
  • Individuals must "subdue the evil tendencies that strive for the mastery", "overcome every besetment, all pride, selfishness, love of the world, and over every wrong word and action".
  • This includes controlling "appetites and passions", resisting "every temptation", and putting away "filthiness of the flesh and of the spirit".
  • The goal is to be "purified from sin by the blood of sprinkling", reflecting "the image of our divine Lord" and becoming "perfect in Christ".
  • While the struggle is continuous and there's "no stopping place" where one can say "I have fully attained", the completion of this character work is required before Christ's return.

In conclusion, the sources strongly assert that sinful nature, with its tendencies and defects, must be completely overcome and purified before the close of probation and the second coming of Christ. While the journey of sanctification is a lifelong process of growth, it must reach its perfection in character in this present life, as no further refining work will be done after Christ leaves the heavenly sanctuary.