Many say that (1) the mind (ie. thoughts) cannot be controlled and (2) the mind need not be controlled for liberation to result. Here is what is written in the Bhagavad Gita, chapter 6, verses 35 and 36:
Arjuna: The mind is very restless, turbulent, strong and obstinate, O Krishna. It appears to me that it is more difficult to control than the wind.
Lord Krishna said: O mighty-armed son of Kunti, what you say is correct; the mind is indeed very difficult to restrain. But by practice and detachment, it can be controlled.
Note the teaching here is clear – the mind can be controlled. Just practice is required. To find out more, please read Chapter 6 of the Bhagavad Gita which explains the meaning of ‘controlling the mind’, the method of doing so, and the result (Moksha)
Q. Dear Tom, I hope you are well. How can one control the mind? Simple English please!
Tom: There are basically two ways of doing this. First of all by various practices to calm the mind and generate peace, of which there are different types (see the link below). Secondly by insight, which means seeing that there is no mind, or no thinker/doer entity, only a spontaneous succession of thoughts.
These two methods usually work together in tandem, like a virtuous circle, one helping the other which in turn helps the other, and so on.
Insight alone is usually not stable and leads to an ‘enlightenment’ that comes and goes, and calm/peace alone is not ultimately liberating, as peace also comes and goes. Both of these alone are not ultimately satisfactory. However the two together usually work wonderfully well.
I’ve written some blog posts here that goes into a bit more detail about some of this, so please take your time to read through these if you want to:
Roadmap to enlightenment: a (fairly) comprehensive guide to spiritual practices
Manifesting awakening in everyday life: purification and insight