1....“With my voice have I cried unto the Lord”. It were enough to say, “with voice:” not for nothing perhaps has “my” been added. For many cry unto the Lord, not with their own voice, but with the voice of their body. Let the “inner man” then, in whom “Christ” has begun to “dwell by faith,” cry unto the Lord, not with the din of his lips, but with the affection of his heart. God hears not, where man hears: unless you cry with the voice of lungs and side and tongue, man hears you not: your thought is your cry to the Lord. “With my voice have I prayed unto the Lord.” What he meant by, “I have cried,” he explained when he said, “I have prayed.” For they too who blaspheme, cry unto the Lord. In the former part he set down his crying, in the latter he explained what it was. As though it were demanded, With what cry have you cried unto the Lord? Unto the Lord, says he, I have prayed. My cry is my prayer, not reviling, not murmuring, not blaspheming.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)