Jesus the Yes and Amen of God!
Give yourself no reason to look further than Jesus...
"For the Son of God, Jesus Christ, whom we proclaimed among you, Silvanus and Timothy and I, was not Yes and No, but in Him it is always Yes. For all the promises of God find their Yes in Him. That is why it is through Him that we utter our Amen to God for His glory."
2 Corinthians 1:19-20