Is intercessory prayer valid? Acts 13:48 Good News Bible &quot;and those who had been chosen for eternal life became believers.&quot;  If believers are chosen then intercessory prayer for unbelievers would seem to be futile.  What am I missing?
What if your prayer for them is part of the &quot;choosing process&quot;?  If you are prompted (or commanded) to pray, then pray.
What God has foreknown, He has predetermined in the creative act.  Will we be a part of His plan or will we step aside?  Jesus did not do many miracles in Nazareth, the place of His upbringing, because of their little faith.
For example, God has determined that creation and Law declare His glory (Psalm 19).  This is not a request...it is a statement, but if we will not willingly do it then inanimate nature will drown out our voice.  God will be glorified!

As he was drawing near—already on the way down the Mount of Olives—the whole multitude of his disciples began to rejoice and praise God with a loud voice for all the mighty works that they had seen, saying, “Blessed is the King who comes in the name of the Lord! Peace in heaven and glory in the highest!” And some of the Pharisees in the crowd said to him, “Teacher, rebuke your disciples.” He answered, “I tell you, if these were silent, the very stones would cry out.” - Luke 19:37-40

As is well said by Ron Kenoly, &quot;Ain't gonna let no rock out-praise me&quot;
What God has determined to be contingent upon our prayers is contingent upon our prayers.  Such knowledge is too lofty for us, we cannot attain it...obey.