Then He [‘Abdu’l-Baha] spoke at length of the
"Composure of Heart," or "Tranquility of the Soul."
"This", He said, "is a state of true faith which gives man such
assurance and conviction of God's bounty, that all the trials and sufferings of
this earth cannot affect him." Speaking of true joy and happiness. He said in part: "…
True joy comes from the tranquility of heart, and this state comes from faith!
Praise be to God who gave us tranquility of heart! This is why we are always
happy. I pray and supplicate to the Beauty of Abha to bless all the servants
and maid-servants with true happiness resulting from the tranquility of
heart."
(Words of ‘Abdu’l-Baha, recorded by Ali-Kuli Khan during his
pilgrimage in 1906)