In the Eastern Orthodox Church liturgical blessings are performed over people, objects, or are given at specific points during divine services. A priest or bishop usually blesses with his hand, but may use a blessing cross, candles, an icon, the Chalice or Gospel Book to bestow blessings, always making the Sign of the Cross therewith. When blessing with the hand, a priest uses his right hand, holding his fingers so that they form the Greek letters IC XC, the monogram of Jesus Christ. A bishop does the same, except he uses both hands, or may hold the crozier in his left hand, using both to make the Sign of the Cross. A bishop may also bless with special candlesticks known as the dikirion and trikirion. When blessing an object, the rubrics often instruct Orthodox bishops and priests to make use of such substances as incense and holy water. Also, formal ecclesiastical permission to undertake an action is referred to as a "blessing". The blessing may be bestowed by a bishop or priest, or by one's own spiritual father. When an Orthodox layperson bestows a blessing, he or she will hold the thumb and first two fingers of the right hand together (the same configuration used when making the Sign of the Cross on themselves), and make the sign of the cross over the person or object they are blessing.