Sacrifice is an important rite in many spiritual traditions. It is the ritual giving up of something for a purpose, such as a payment for sins, an expression of gratitude, a purgation in preparation of receiving a blessing, or an offering intended to evoke a response from the invisible world. Give up something, other than money and time, for a cause you believe in.

Frederic & Mary Ann Brussat in Spiritual Rx: Prescriptions for Living a Meaningful Life