Four volumes of letters
on the integral yoga,
other spiritual paths,
the problems of spiritual life,
and related subjects.
In these letters, Sri Aurobindo explains
the foundations of his integral yoga,
its fundamentals, its characteristic experiences
and realizations, and its method of practice.
He also discusses other spiritual paths
and the difficulties of spiritual life.
Related subjects include the place of human
relationship in yoga; sadhana through
meditation, work and devotion;
reason, science, religion, morality, idealism;
spiritual and occult knowledge;
occult forces, beings and powers;
destiny, karma, rebirth and survival.
Sri Aurobindo wrote most of these letters
in the 1930s to disciples.
A considerable number of them
are being published for the first time.