"Repentance is valued above sacrifices [Pesikta R.]… above prayer." ~~ Tanna Deve Eliyahu Zuta
"Pray for the peace of Jerusalem!" ~~ Psalms (Tehillim) 122:6
"The gates of prayer are never closed. " ~~ Deuteronomy (Devarim) R.
"Who answers Amen is greater than the suppliant." ~~ Talmud, Berakhot
"What is our prayer for rain? “We thank You for each drop that You have let fall.”" ~~ Talmud, Berakhot
"Prayer or benediction without intention is like body without soul." ~~ Tanya
"Prayer is the service of the heart." ~~ Talmud, Ta’anit
"You don’t have to pray loudly; just direct your heart to heaven." ~~ Rabbi Chia
"Who cries over the past is offering a vain prayer." ~~ Berakhot 9:3
"Prayer without intention is like a body without a soul." ~~ Yeshu’ot Meshicho
"O Music! miraculous art! A blast of thy trumpet, and millions rush forward to die; a peal of thy organ, and uncounted nations sink down to pray." ~~ Benjamin Disraeli
"Man can never be happy if he does not nourish his soul as he does his body." ~~ Rebbe Manachen Schneerson