Why do we wear marks (tilak, pottu and the like) on the forehead? The tilak or pottu invokes a feeling of sanctity in the wearer and others. It is recognized as a religious mark. Its form and colour vary according to one�s caste, religious sect or the form of the Lord worshipped. In earlier times, the four castes (based on varna or colour) - Brahmana, Kshatriya, Vaishya and Sudra - applied marks differently. The brahmin applied a white chandan mark signifying purity, as his profession was of a priestly or academic nature. The kshatriya applied a red kumkum mark signifying valour as he belonged to warrior races. The vaishya wore a yellow kesar or turmeric mark signifying prosperity as he was a businessman or trader devoted to creation of wealth. The sudra applied a black bhasma, kasturi or charcoal mark signifying service as he supported the work of the other three divisions. Also Vishnu worshippers apply a chandan tilak of the shape of "U," Shiva worshippers a tripundra of bhasma, Devi worshippers a red dot of kumkum and so on). The tilak cover the spot between the eyebrows, which is the seat of memory and thinking. It is known as the Aajna Chakra in the language of Yoga. The tilak is applied with the prayer - "May I remember the Lord. May this pious feeling pervade all my activities. May I be righteous in my deeds." Even when we temporarily forget this prayerful attitude the mark on another reminds us of our resolve. The tilak is thus a blessing of the Lord and a protection against wrong tendencies and forces. The entire body emanates energy in the form of electromagnetic waves - the forehead and the subtle spot between the eyebrows especially so. That is why worry generates heat and  causes a headache. The tilak and pottu cools the forehead, protects us and prevents energy loss. Sometimes the entire forehead is covered with chandan or bhasma. Using plastic reusable "stick bindis" is not very beneficial, even though it serves the purpose of decoration.

Om is one of the most chanted sound symbols in India. It has a profound effect on the body and mind of the one who chants and also on the surroundings. Most mantras and vedic prayers start with Om.

All auspicious actions begin with Om. It is even used as a greeting - Om, Hari Om etc. It is repeated as a mantra or meditated upon. Its form is worshipped, contemplated upon or used as an auspicious sign.

Om is the universal name of the Lord. It is made up of the letters A (phonetically as in "around"), U (phonetically as in "put") and M (phonetically as in "mum"). The sound emerging from the vocal chords starts from the base of the throat as "A". With the coming together of the lips, "U" is formed and when the lips are closed, all sounds end in "M".

The three letters symbolize the three states (waking, dream and deep sleep), the three deities (Brahma, Vishnu and Shiva), the three Vedas (Rig, Yajur and Sama) the three worlds (Bhuh, Bhuvah, Suvah) etc. The Lord is all these and beyond.

The formless, attributeless Lord (Brahman) is represented by the silence between two Om Chants. Om is also called pranava that means, "that (symbol or sound) by which the Lord is praised". The entire essence of the Vedas is enshrined in the word Om. It is said that the Lord started creating the world after chanting Om and atha. Hence its sound is considered to create an auspicious beginning for any task that we undertake. The Om chant should have the resounding sound of a bell (aaooommm).

Om is written in different ways in different places. The most common form symbolizes Lord Ganesha’s. The upper curve is the head; the lower large one, the stomach; the side one, the trunk; and the semi-circular mark with the dot, the (modaka) in Lord Ganesha's hand. Thus Om symbolizes everything - the means and the goal of life, the world and the Truth behind it, the material and the Sacred, all form and the Formless.