Testimonies for the Church vol.2 p.189,190
"It is impossible for the soul to flourish while prayer is not a special exercise of the mind. Family or public prayer alone is not sufficient. Secret prayer is very important; in solitude the soul is laid bare to the inspecting eye of God, and every motive is scrutinized.
Secret prayer!
How precious!
The soul communing with God!
Secret prayer is to be heard only by the prayer-hearing God.
No curious ear is to receive the burden of such petitions."
He that dwelleth in the secret place of the most High shall abide under the shadow of the Almighty.