John Bunyan writes with honesty and insight of his own experiences in prayer:
May I but speak my own experience, and from that tell you the difficulty of praying to God as I ought, it is enough to make your poor, blind, carnal men to entertain strange thoughts of me. For, as for my heart, when I go to pray, I find it so loathe to go to God, and when it is with him, so loathe to stay with him, that many times I am forced in my prayers, first to beg of God that he would take mine heart, and set it on himself in Christ, and when it is there, that he would keep it there. Nay, many times I know not what to pray for, I am so blind, nor how to pray, I am so ignorant; only, blessed be grace, the Spirit helps our infirmities.
Oh! the starting-holes that the heart hath in the time of prayer; none knows how many bye-ways the heart hath, and back- lanes, to slip away from the presence of God. How much pride also, if enabled with expressions. How much hypocrisy, if before others. And how little conscience is there made of prayer between God and the soul in secret, unless the Spirit of supplication be there to help? When the Spirit gets into the heart, then there is prayer indeed, and not till then.