सर्वे भवन्तु सुखिन:
सर्वे सन्तु निरामया:।
सर्वे भद्राणि पश्यन्तु।
मा कश्चित् दु:खभाग भवेत् ।।
Happiness be unto all.
Perfect health be unto all.
May all see what is good.
May all be free from suffering.
iv - Self-Study; (Swadhyaya)
Swadhyaya or self-study is not just study of scriptures and books written by the realized ones, but also enquiry into the nature of the self. Swadhyaya is asking the question, "Who am I?"
The commentator Vyas defines self-study as the recitation of OM or Gayartri Mantra and the study of the Vedas and Upanishads. This leads to liberation, because they dwell on the of obtaining the realisation of Self and Brahma. The regular reading and teaching of these works is study of scriptures. This is of 3 kinds.

Mental Study (Baudhika Swadhyaya) It consists of following :-
To mediate on Pranava in the Intellect Sheath in Brahma Randhra. The aspirant should write OM there by imagination and then fix his attention on it.
To chant the Gayatri Mantra mentally by writing it mentally in the Intellect·Sheath. Again, silently and without any physical activity. This leads to self- realisation and. therefore, is called mental study. Mental study is the same as intellectual study.

Verbal Study (Vachika Swadhyaya)
Verbal study is to read or teach the Vedas, Smritis, Upanishadas and other ancient books dealing with spiritual knowledge. It includes loud recitation of Om and the Vedic Mantras, prayers to God, and the study of Gita, Ramayana, Mahabharata, Puranas, Upanishadas, Vdas, six schools of philosophy, etc. or to study, under the guidance of a teacher, religious and philosophical works in any language.

Physical Study (Sharirika Swadhyaya)
For every kind of study the co-operation of the body is indispensable. When you read or think, the body helps you. Therefore, the study by tongue and intellect is physical study. But a dumb child reads with the help of his fingers or by signs and keeps himself engaged in study for ten or twelve hours. This is the real physical study. To think, meditate and realise the Veda Mantras, the Sutras of Darshan books and the philosophies of some sentences of the Upanishadas. The meditation must be followed by concentration, which leads to the realisation of what is imagined. Meditation, contemplation and super-consciousness are practised by intellect (Budhi) which presents objects beyond the reach of the senses.