Sometimes you can pray very quickly, because the love of God burns very strongly in your heart and the words flow from your mouth by themselves. 1
Footnotes
1.
See above, sect. 32. Cf. Keter Shem Tov, sect. 217, that in the state of intense deveikut, the holy spark of the Shechinah inherent in man’s soul will sometimes extend itself to the point that words spoken flow from It. It seems that the person is not speaking by himself but that the words flow from his mouth by themselves.