The Lord Jesus when He quickens them, gives them a voice and a tongue, and says to them, "Be dumb no more." God has no dumb children. It is as much a part of their new nature to pray, as it is of a child to cry. They see their need of mercy and grace. They feel their emptiness and weakness. They cannot do otherwise than they do. They must pray.
Taken from the book A Call to Prayer by JC Ryle 1816-1900