In the past one year, I have reviewed at least 90 statements of purpose/motivation letters. In many of these documents, scholarship candidates tend to follow a pattern. A very wrong pattern. When writing a statement of purpose or a motivation letter, or even before applying for any scholarship, it is very relevant to understand the goals of the scholarship. The common goals are research advancement in peculiar fields, promotion of UN SDGs and leadership. 

It is your job to clearly understand which goal informs the scholarship opportunity and how to articulate that particular goal to be reflected in your content and story. This is as important as any other document that is required in the application. Without communication of a clear adoption and internalization of the goal of the scholarship, it is impossible to win it. Having said this. Now hear this, over 99% of graduate (Masters & PhD) scholarships are not for the less privileged. 

What do I mean by this: Do not present your story to explore emotional bank or pity from the scholarship board. That is a cold approach and the surest way to fail. Don't lament that you're poor, don't have money nor opportunity. This is usually a sure way to fail. 

Focus on your strengths and conceal your weakness. We all have our weaknesses, but every scholarship committee wants to see those strengths. Believe me, poverty is not a strength, it is not a virtue. If the scholarship asks for your weakness, still, poverty is not the best leg to put forward. Stop trying to achieve pity with your statement of purpose or motivation letter. I repeat: graduate scholarships are not for the less privileged.