Here are several key quotes from Ellen White's writings on prayer: - "Prayer is the breath of the soul. It is the secret of spiritual power. No other means of grace can be substituted, and the health of the soul be preserved. Prayer brings the heart into immediate contact with the Well-spring of life, and strengthens the sinew and muscle of the religious experience. Neglect the exercise of prayer, or engage in prayer spasmodically, now and then, as seems convenient, and you lose your hold on God. The spiritual faculties lose their vitality, the religious experience lacks health and vigor." (GW 254.4) - "Prayer is the opening of the heart to God as to a friend. Not that it is necessary in order to make known to God what we are, but in order to enable us to receive Him. Prayer does not bring God down to us, but brings us up to Him." (SC 93.2) - "The idea that prayer is not essential is one of Satan's most successful devices to ruin souls. Prayer is communion with God, the Fountain of wisdom, the Source of strength, and peace, and happiness. Jesus prayed to the Father 'with strong crying and tears.' Paul exhorts believers to 'pray without ceasing,' in everything, by prayer and supplication, with thanksgiving, making known their requests to God. 'Pray one for another,' James says. 'The effectual fervent prayer of a righteous man availeth much.'" (7T 42.3) - "Prayer is not an expiation for sin; it has no virtue or merit of itself. All the flowery words at our command are not equivalent to one holy desire. The most eloquent prayers are but idle words if they do not express the true sentiments of the heart. But the prayer that comes from an earnest heart, when the simple wants of the soul are expressed, as we would ask an earthly friend for a favor, expecting it to be granted—this is the prayer of faith." (MB 86.2) - "You need to bring your soul into close communion with God by earnest prayer mixed with living faith. Every prayer offered in faith lifts the suppliant above discouraging doubts and human passions. Prayer gives strength to renew the conflict with the powers of darkness, to bear trials patiently, and to endure hardness as good soldiers of Christ." (GW 320.3) - "Toilers in the busy walks of life, crowded and almost overwhelmed with perplexity, can send up a petition to God for divine guidance. ... In every circumstance, under every condition, the soul weighed down with grief and care, or fiercely assailed by temptation, may find assurance, support, and succor in the unfailing love and power of a covenant-keeping God." (PK 631.2) If you would like more quotes or a specific focus (such as prayer for families, intercessory prayer, or prayer and faith), please let me know!