This is nothing complicated to understand why we need to know if we have the motivation to achieve our goals or not. But the thing is, we often ignore this fact and set our goals blindly. Maybe the word 'blindly' sounds harsh but you will see how we sometimes run for something which we don't believe in, are not interested, and don't add any value. It's because of peer pressure, family demands, social status, and many more things that force us to act like this.
But don't you think, it's an unhealthy practice?
Whenever we set a goal or think about something to achieve we must crosscheck if we really want that or not. Many of our goals are not the output of our personal desire but the result of outside forces. So whenever we run to achieve that, there's a high chance that in the middle of the journey we will find that meaningless, difficult, no motivation to fulfill it.
Take an example from your real life and you will understand how this 'motivation' works. Or you can notice the life of some famous person. You will probably find many, who do some certain things for a living but after some time they change their journey or fail to achieve it. I wouldn't say, the lack of motivation is the only cause there but it's one of the major reasons for sure.
Ask yourself, 'do you really what to make it happen?' 'What makes you desire for your goals?' Knowing these basic questions can give us a clear understanding of whether we should go for our goal and work on it or we should leave it. Also, this process can help us to work on our motivation. So we can make ourselves achieve something even with low motivation if that is necessary for life.