Therefore the Lord himself will give you a sign: The virgin will conceive and give birth to a son, and will call him Immanuel (Isaiah 7:14 NIV).
This is how the birth of Jesus the Messiah came about: His mother Mary was pledged to be married to Joseph, but before they came together, she was found to be pregnant through the Holy Spirit (Matthew 1:18).
A promise is defined as an assurance that one will do a particular thing or a particular thing will happen. Many times people give promises that they do not keep. Sometimes they fail to keep the promises intentionally, while other times circumstances hinder them from keeping or following through with their promises.
God always keeps promises. We can believe with confidence that if God said it, then it will happen. We may not know the exact time, day, or year, but it will come to past. Isaiah prophesied about a virgin given birth, and scholars believed that it was fulfilled almost 600 years later.
God keeps his promises.