Assurance
 

For non-reformed theologies..."at the end of the day, the security of the believer finally rests with the believer. For those in the opposite camp [Reformed], the security of the believer finally rests with God -- and that, I suggest, rightly taught, draws the believer back to God himself, to trust in God, to a renewed faith that is of a piece with trusting him in the first place." - D. A. Carson

It is only in proportion as the Christian manifests the fruit of a genuine conversion that he is entitled to regard himself and be regarded by others as one of the called and elect of God. It is just in proportion as we add to our faith the other Christian graces that we have solid ground on which to rest in the assurance we belong to the family of Christ. It is not those who are governed by self-will, but “as many as are led by the Spirit of God, they are the sons of God” (Romans 8:14). - Arthur W. Pink

Sit not down without assurance. Get alone, and bring thy heart to the bar of trial: force it to answer the interrogatories put to it to set the qualifications of the saints on one side, and the qualifications of thyself on the other side, and then judge what resemblance there is between them.... Yet be sure thou judge by a true touchstone, and mistake not the Scripture description of a saint, that thou neither acquit nor condemn thyself by mistake. - Richard Baxter

The Scripture abounds in commands and cautions for our utmost diligence in our search and inquiry as to whether we are made partakers of Christ or not, or whether His Spirit dwells in us or not—which argue both the difficulty of attaining an assured confidence herein, as also the danger of our being mistaken, and yet the certainty of a good issue upon the diligent and regular use of means to that purpose. - John Owen

If our religion be of our own getting or making, it will perish; and the sooner it goes, the better; but if our religion is a matter of God's giving, we know that He shall never take back what He gives, and that, if He has commenced to work in us by His grace, He will never leave it unfinished. - Charles Spurgeon