The background of Hebrews 3:10, as reflected in Ellen White's writings, centers on the experience of the Israelites during their journey from Egypt and their repeated acts of unbelief and rebellion against God. Paul, in Hebrews 3, uses the history of Israel's provocation in the wilderness as a warning to Christians not to harden their hearts or fall into unbelief as the Israelites did. Ellen White references this passage in the context of exhorting believers to steadfastness and faith. She highlights that the Israelites' failure was due to an "evil heart of unbelief" (see Hebrews 3:12-16), which led them to depart from the living God despite the light and privileges they had received. This serves as a warning for Christians to remain faithful and not allow discouragement or temptation to lead them away from God. The broader context in Hebrews is an appeal to perseverance and faith, especially in times of trial. Paul reminds believers of the consequences of Israel's unbelief and encourages them to hold fast their confidence in Christ, exhorting one another daily to avoid being hardened by the deceitfulness of sin. In summary, Hebrews 3:10 is set against the backdrop of Israel's wilderness experience, serving as a cautionary example for Christians to maintain faith and obedience, lest they repeat the mistakes of the past and miss out on God's promised rest. Reference: - "Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God. ... For some, when they had heard, did provoke: howbeit not all that came out of Egypt by Moses.” Hebrews 3:12-16. (Ellen G. White, Testimonies for the Church, vol. 8, p. 115.3)