God's promises are so vast and amazing that the only way to embrace them is by faith. Neither reason nor Kierkegaard's "leap into the void" will do. Only resting in what God has declared in His most holy Word.
One of the promises "too glad to be true" is God's covenant to bless His people "unto a thousand generations." Pictured below are four of such. Little Will is the only and firstborn son of Josiah, the eldest and firstborn son of Gene, the eldest and firstborn son of Verle, the eldest and firstborn son of Harold (not pictured) who was himself the eldest and firstborn son of John (not pictured.)
Looking at this picture I am near moved to tears as I am reminded of the blessings that I enjoy both up and downstream. And this is but 4/1000ths of what God has promised to those who believe what He has revealed about His extravagant love for the world.