Are Thoughts Asset or Liability?

From one perspective we can see thoughts as liability, wouldn't the life be much easier if we were not able to think? I think it would be easier, but would it be deeper, meaningful and worth living? I think it could be but it would be much harder for us to live, since we would behave much like the animals. But this is only the tip of the iceberg.

We can make from our thoughts enemies by having the wrong mindset or having mental illness, but without thoughts no breakthrough could be made and innovation wouldn't be known.

Thoughts are not bad, they are just tools that we have to use for our advantage and some fail at that. The most successful people in the world are most of the time the absolute masters of their mind and spirit and they do not allow any unwanted thought to enter and clutter their mind. We can say this is discipline but it is more than that.

The best way to start having stronger mind is to check what is the reason that here I had thought X and here Y? When I find the reason I try to ask if there is a reason that this reason happened in the first place so long as I reach the bottom, the core misconception that was holding this thought on me. Then I eliminate it. Repeat.