So often we feel insufficient to bow before the Father in prayer. We can't always seem to find the words to speak what's in our hearts. But God knows our hearts, and He hears our intentions. Brother Branham tells it so perfectly in the simple story below.

A little—little boy, one time, down south, there was a—a saying, that he was kneeling in a row where he had been plowing. And as a—a clergyman passed by and heard the little fellow repeating the alphabet, "A, B, C, D," so forth, and he was on his knees, so the clergyman was very much disturbed. So he heard the little boy repeat the alphabet, and then say, "Amen."
And as he got up, why, the clergyman spoke to him, and said, "Sonny, I am a…the servant of the Lord. And I heard you praying, but you were only saying the alphabet. And I—I don't understand why that you were just saying the alphabet."
   
He said, "Sir, I—I can't pray." He said, "I—I had never prayed. But, I had a praying mother and father, which has done gone on to Heaven." And said, "Mother, I…She died when I was such a little boy. But I remember of hearing her when she was in trouble, she went to the Lord, and she prayed. And she died when I was so young, she couldn't teach me to pray. And I have been given into the hands of an unkind person, who beats me and mistreats me. And I—I was…thought, maybe, after I had learned my ABC's, if I could take all the—the words and say all the letters, maybe He could put it together and understand what I meant."
That's the prayer of sincerity. Certainly He could put them together. It's not how we pray, in our lips, it's the motive of our heart, is what God hears. He sometimes don't hear our lips; He hears our intention, what the motive of our heart.       57-0120M The Impersonation Of Christianity

Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered. Romans 8:26