Philip Yancey said this quote
“ …I interviewed ordinary people about prayer. Typically, the results went like this: Is Prayer important to you? Oh, yes. How often to you pray? Every day. Approximately how long? Five minutes – well, maybe seven. Do you sense the presence of God when you pray? Occasionally, not often. Many of those I talked to experienced prayer more as a burden than as a pleasure. They regarded it as important, even paramount, and felt guilty about their failure, blaming themselves. Does this sound familiar? (pp. 14/Prayer: Does It Make Any Difference?) ”