In plain words
A driver who has good sense will not seat anyone in the car without the owner's permission. Only a driver with some bad qualities picks up others now and then and drives off with the ‘chariot’ (chariot). That is why this Buddhi is what inquires into the action the Manas has decided upon. So for some time we must train ourselves a little not to follow the senses, the body and the Manas, but to follow the Buddhi. When we follow the Buddhi, through the “recommendation” of the Buddhi we shall enjoy the Ātma's own contentment too, and so become the object of the Ātma's grace. When many thoughts multiply through the wavering of our Manas, do not follow the Manas at once; hand them over to the Buddhi. Take time until the Buddhi has inquired and come to a decision whether this is good or bad. Today in the world those who follow the Manas are the many. Through such fickleness he follows paths of many kinds and in the end falls into sorrow. Man does. Following the Manas is the root cause of unrest of every kind. It is good for us to take time, give the inquiry the Buddhi speaks of a little space, and so enter on an action with patience. We should not plunge into action the moment a thought arises. To be hasty is not good. Haste makes waste. Waste makes worry. so do not be in a hurry
This hastiness brings man many troubles and losses. Man should curb such hastiness a little: when agitation or anger arises and he keeps dwelling on that very anger, thinking, ‘I got so angry,’ the anger grows greater still. Whether in a moment of anger. Or in a moment of agitation, if we call this ‘Śānti’ to mind many times, ‘Śānti śśānti śśāntiḥ’, the agitation or the anger has the chance to cool down. But how should we repeat this Śānti? In a moment of anger we must say ‘Śānti śśānti śśāntiḥ’ calmly, speaking of calm with calm itself. If we say ‘Śānti śśānti śśāntiḥ’ without restraint, even the Śānti there was will be lost. So we are uttering the word ‘Śānti’, but there is no calm in the speech or in the voice. Just as we can draw out a thorn only with a thorn, just as we can cut a diamond with a diamond, just as we wipe out karma through karma, Śānti must be won only through Śānti. So, on the day we develop this principle of Śānti. On that very day we become those who recognise humanness. In short, what we must recognise is the secret of the body and the secret of the Manas. Once we have recognised the secret of the senses and the secret of the Buddhi, the three, we shall become fearless.