Proverbs 28:13 "He that covereth his sins shall not prosper: but whoso confesseth and forsaketh [them] shall have mercy."
1 John 1:9 "If we confess our sins, He is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness."
Being "right" with God has conditions. Two are mentioned here: confess and forsake. Conditions met, the promise is unequivocal. (Education 257)
Unequivocal: leaving no doubt
"For the pardon of sin, for the Holy Spirit, for a Christlike temper, for wisdom and strength to do his work, for any gift he has promised, we may ask; then we are to believe that we receive, and return thanks to God that we have received."
Review and Herald, November 11, 1915 par. 14