Alexander Maclaren emphasizes the significance of earnest prayer, contrasting it with vain repetition. He illustrates that true prayer arises from a deep sense of need and faith, as exemplified in Psalms 86:1-5, where the psalmist persistently calls upon God using various names that reflect His character. Maclaren encourages believers to approach God with their necessities, trusting in His mercy and character, and to expect joy and gladness as a result of their prayers. He highlights that the essence of prayer lies not in the formality of words but in the heartfelt connection to God, who is always ready to respond to those who earnestly seek Him.