Every time my family and I hear someone in a TV show or movie say, "I promise" we say, oh my gosh... We have even taught our kids not to say that they promise anything. We are human, we can't always keep our promises. We can try but we will most likely fail then we have told someone something we weren't able to follow through with and then you are dealing with unbroken promises and damaged trust.
There is only one person whose promises stand true and that is God. So, I leave the making of promises to Him.
In Hebrews 6:13-20 the section is titled God's Promises Bring Hope and in verses 13-15 it says, "For example, there was God’s promise to Abraham. Since there was no one greater to swear by, God took an oath in his own name, saying: 'I will certainly bless you,
and I will multiply your descendants beyond number.' Then Abraham waited patiently, and he received what God had promised."
God made a lot of promises and covenants in the Bible, and they all came to fruition because God knows all. He leads and directs everything, so He can make promises and keep them.
When you hear from God and you know it is a promise from Him, you will know that He will see it through.
Look at Abraham and the promise God gave him...that he would be the father of many nations.... the 12 tribes of Israel came from Abraham, so I'd say that God's promise stood to be true.
Hebrews 6:17-19 reads, "God also bound himself with an oath, so that those who received the promise could be perfectly sure that he would never change his mind. So God has given both his promise and his oath. These two things are unchangeable because it is impossible for God to lie. Therefore, we who have fled to him for refuge can have great confidence as we hold to the hope that lies before us. This hope is a strong and trustworthy anchor for our souls. It leads us through the curtain into God’s inner sanctuary."
Trusting in God is important and we as the imperfect humans we are we struggle with trust but when we read the Word of God, we can see that He is trustworthy through all He has said because it has all happened. That God does not change His mind once a promise is made. God's promises are true.