How do we know that God's promises are trustworthy?

In 2 Peter 1:4, it states that believers are given 'exceeding great and precious promises' by which they may become partakers of the divine nature. The trustworthiness of these promises stems from the character of God Himself; He is immutable and faithful, ensuring that every promise made by Him will be fulfilled. Furthermore, historical evidence in Scripture shows how God has consistently fulfilled His promises throughout time, thus encouraging believers to trust in His unwavering commitment to them. It is through these promises that Christians find hope, strength, and assurance in their faith.