For God alone, O my soul, wait in silence,
    for my hope is from him.
–Psalm 62:5 (ESV)–

Be still, and know that I am God.
–Psalm 46:10 (ESV)–

Be not rash with your mouth,
nor let your heart be hasty to utter a word before God,
for God is in heaven and you are on earth.
Therefore let your words be few.
–Ecclesiastes 5:2 (ESV)–

Pray then like this:

“Our Father in heaven,
hallowed be your name.
Your kingdom come,
your will be done,
    on earth as it is in heaven.
Give us this day our daily bread,
and forgive us our debts,
    as we also have forgiven our debtors.
And lead us not into temptation,
    but deliver us from evil.”
–Matthew 6:9-13 (ESV)–

And he came to the disciples and found them sleeping.
And he said to Peter, “So, could you not watch with me one hour?”
–Matthew 26:40 (ESV)–

Today, if you hear his voice,
do not harden your hearts as in the rebellion.
–Hebrews 3:15 (ESV)–

Seek the Lord while he may be found.
–Isaiah 55:6 (ESV)–

—

Richard J. Foster, Prayer: Finding the Heart’s True Home, ch. 14: “Contemplative Prayer.” (HarperCollins, 1992).

—. Streams of Living Water, ch. 2: “The Contemplative Tradition: Discovering the Prayer-Filled Life.” (HarperCollins, 1998).

Clifford Wilson and John Weldon, Occult Shock and Psychic Forces: A Biblical View (Master Books, 1980), chs. 6-7.

Pilgrim’s Progress (C. O. Baptista Films, 1978).