How do we know that Jesus will keep His promises?

The assurance that Jesus will keep His promises is rooted in His divine nature as God. In John 14:1-3, we see that He is going to prepare a place for His followers, which underscores His commitment to their eternal destiny. His faithfulness is highlighted in scripture, where Paul states in 2 Timothy 2:13, 'If we deny Him, He also will deny us: If we believe not, yet he abideth faithful; he cannot deny himself.' This indicates that Jesus’ promises are bound to His character, and since He cannot deny Himself, all His words shall come to pass as He has declared.