How do we know that God's promises are exceeding great?

In 2 Peter 1:4, it describes how God's divine power has given us all things necessary for life and godliness, through the knowledge of Him who called us by glory and virtue. The promises of God are exceeding great because they not only provide hope but also assurance of His eternal faithfulness and sovereignty. These promises include salvation, eternal life, and spiritual blessings that are incomprehensible. They assure believers that despite present struggles, there is a glorious inheritance reserved for them, which is a testament to God's power and mercy.