How do we know God's promises to keep us are true?

The assurance of God's promises lies in His sovereign power and faithfulness. The psalmist assures us that "He will not suffer thy foot to be moved" (Psalm 121:3), emphasizing that those whom God keeps cannot be lost. This is affirmed in John 10:28-29, where Jesus states, "They shall never perish, neither shall any man pluck them out of my hand." God's omnipotence confirms that His will and purpose shall prevail, providing believers with a firm foundation of security in their salvation.