God's Good Promise
Blessed be the Lord, that hath given rest unto his people Israel, according to all that he promised: there hath not failed one word of all his good promise, which he promised by the hand of Moses his servant. 1 Kings 8:56
When we purchase something of great value---a house, for example---we are usually required to put down a deposit to indicate our sincerity and to promise that our intentions are serious. That deposit is a form of insurance, a guarantee that adds substance to our word.
God has made some incredible promises to us---promises that stagger our imaginations. He has promised that we might have a relationship with Him through His Son. He has promised never to leave us or forsake us and to be with us always. He has promised to take us to Heaven when we die. The Bible is full of God's promises.
Someone might ask, "What insurance do we have that God is serious? How do we know His promises can be trusted?" God's deposit is the most precious investment anyone could make: His Son, who by His death and resurrection purchased our salvation. Not only is Jesus Christ a sufficient "down payment" on God's promises, He is, in fact, payment in full!
From, HOPE for Each Day: Morning & Evening Devotions, by Billy Graham.