How do we know full assurance of faith is true?

The certainty of full assurance of faith rests on the believer's trust in God's Word, as emphasized in Hebrews 10:21. This full assurance comes by approaching God in genuine faith, supported by the assurance that we have from His promises. The writer encourages believers to draw near with a true heart, fully convinced that what God declares is true. Assurance is gained not through human emotions or experiences, but solely through a deep-seated belief in the reliability of Scripture, reminding us that it is God's commitment to His Word that dispels all doubt.