Why Hindus wear the Tilak...
Without the worship of Sri Ganesh no work in Sanatan
Dharma should begin. Likewise, no religious work should
begin without a Tilak or Tika on the forehead. Chandan or
sandalpaste, roli, kumkum, sindoor and sacred ash
or Vibhuti can also be used as Tilak. The Tilak is used
in various ways for different reasons.
Without the Tilak,
Sandhya, Puja, Deva Darshan, Tarpan and other religious
activities should not be performed. There are thirteen
places on the human body where Tilak can be placed
however, it is only on the forehead that it is considered noble.
The head is the summit of the body with the brain being
the axis of the entire body. According to Hindu Astrology,
Mesh Rashi or the House of Aries is on the forehead.
The Lord of Mesh is Mars and his colour is Red. This is
why Red Chandan and sindoor is placed as Tilak on the
forehead.