The assurance of salvation comes through the written Word of God, received in faith as the very word of Him "who cannot lie" (Titus 1:2). Let us look at THREE WORDS from God to believing sinners that are true of all without exception whose faith is in the Lord Jesus alone for salvation.

ARE—a present fact to be enjoyed here and now.
"By grace ye ARE saved" (Ephesians 2:__)
"Your sins ARE forgiven you" (1 John 2:__).
"All that believe ARE justified" (Acts 13:__).
"Now ARE we the sons of God" (1 John 3:__).
"Ye ARE all the children of God by faith" (Galatians 3:__).
"Ye ARE made nigh by the blood of Christ" (Ephesians 2:__).
"WE ARE His workmanship, created in Christ" (Ephesians 2:__).

HATH—a present possession.
"God HATH given to us eternal life" (1 John 5:__).
"He that hath the Son HATH life" (1 John 5:__).
"God, who HATH saved us" (2 Timothy 1:__,__).
"He that believeth on the Son HATH everlasting life" (John 3:__).
"He that…believeth on Him…HATH everlasting life" (John 5:__).
"He that believeth on Me HATH everlasting life" (John 6:__).
"Who…HATH translated us into the kingdom" (Colossians 1:__).

KNOW—to have assurance of now, not hope for.
"Ye may KNOW that ye have eternal life" (1 John 5:__).
"We KNOW…we shall be like Him" (1 John 3:__).
"We KNOW…we have…an house…eternal" (2 Corinthians 5:__).
"I KNOW whom I have believed" (2 Timothy 1:__).
"We KNOW that we have passed from death unto life" (1 John 3:__).
"Ye KNOW…redeemed…with…blood of Christ" (1 Peter 1:__,__).
"We KNOW…the true God, and eternal life" (1 John 5:__).