Using the analogy of a computer, Sadguru beautifully explains the four aspects of the mind, namely –

मनस् manas – a collection of all kinds of thoughts
बुद्धि buddhi – the ability to discriminate, analyse, and come to a decision
चित्त citta – memory, storage
अहंकार ahaṁkāra – identification
The body follows what is collectively dictated by these four aspects of the mind.

Having described this, Sadguru then shares how to attain a good mind, with pure thoughts and pure intentions, ultimately leading to pure actions.