Romans 8:15-18 - "For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father. The Spirit itself beareth witness with our spirit, that we are the children of God: and if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with Him, that we may be also glorified together. For I reckon that the sufferings of this present time are not worthy to be compared with the glory which shall be revealed in us."
Ephesians 1:3-14 - "Blessed be the God and Father of our Lord Jesus Christ, Who hath blessed us with all spiritual blessings in heavenly places in Christ: according as He hath chosen us in Him before the foundation of the world, that we should be holy and without blame before Him in love: having predestinated us unto the adoption of children by Jesus Christ to Himself, according to the good pleasure of His will, to the praise of the glory of His grace, wherein He hath made us accepted in the Beloved. In Whom we have redemption through His blood, the forgiveness of sins, according to the riches of His grace; wherein He hath abounded toward us in all wisdom and prudence; having made known unto us the mystery of His will, according to His good pleasure which He hath purposed in Himself: that in the dispensation of the fulness of times, He might gather together in one all things in Christ, both which are in heaven, and which are on earth; even in Him: in Whom also we have obtained an inheritance, being predestinated according to the purpose of Him who worketh all things after the counsel of His own will: that we should be to the praise of His glory, who first trusted in Christ. In whom ye also trusted, after that ye heard the Word of truth, the Gospel of your salvation: in Whom also after that ye believed, ye were sealed with that Holy Spirit of promise, Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of His glory."
Titus 3:3-7 - "For we ourselves also were sometimes foolish, disobedient, deceived, serving divers lusts and pleasures, living in malice and envy, hateful, and hating one another. But after that the kindness and love of God our Saviour toward man appeared, not by works of righteousness which we have done, but according to His mercy He saved us, by the washing of regeneration, and renewing of the Holy Ghost; Which He shed on us abundantly through Jesus Christ our Saviour; that being justified by His grace, we should be made heirs according to the hope of eternal life."
We are His adopted children, by grace, through faith in Jesus Christ our Lord!