God wants to show us that in relying on ourselves there are things which we cannot do.
We sincerely wish to help God, but God has no need of any human help.
People who try to help Him with their fleshly wisdom and power will never receive His approval.
Many are rejected by Him not because they lack in wisdom and power, but because they are too wise and powerful.
Hence God cannot use them.
He has to set them aside and let them cool down.
He will wait until their natural fire is extinguished before He will use them.