Ante-Nicene Fathers, Vol III: Tertullian: Part III: We Mu...
Chapter XII.—We Must Be Free Likewise from All Mental Perturbation.
Nor merely from anger, but altogether from all perturbation of mind, ought the exercise of prayer to be free, uttered from a spirit such as the Spirit unto whom it is sent. For a defiled spirit cannot be acknowledged by a holy Spirit, 8838 nor a sad by a joyful, 8839 nor a fettered by a free. 8840 No one grants reception to his adversary: no one grants admittance except to his compeer.