The Atma (spirit) is like the ocean. To instruct a person about it, you
need not have to ask him to drink the entire ocean; a single
drop placed on the tongue will give the needed knowledge. So
too, if you desire to know the Upanishads (ancient Indian spiritual texts), you need not have to follow
every single manthra (sacred hymn). Learn and
experience the implication of one manthra; you can
realize the Goal without fail. Learn and practise. Learn
to practise. That is the secret of the teaching.
- Divine Discourse,
Upanishad Vahini.