… in the realm of conscience naught but the ray of God’s
light can command, and on the throne of the heart none but the pervading power
of the King of Kings should rule. Thus it is that one can arrest and suspend
[the action of] every faculty except thought and reflection; for a man cannot
even by his own volition withhold himself from reflection or thought, nor keep
back his musings and imaginings.
(‘Abdu’l-Baha, ‘A Traveler’s Narrative’)