2 Cor. 1:21,22. “Now he that established us with you in Christ, and hath anointed us, is God; Who HATH SEALED us, and given the earnest of the Spirit in our hearts”.
We were SEALED the moment we believed.
Eph.1:13. “In whom ye also trusted, AFTER that ye heard the word of truth, the gospel of your salvation: In whom also AFTER THAT he BELIEVED, ye WERE SEALED with that Holy Spirit of promise”.
..you may have “forgotten” the wrong things
Indeed!..and Amen!