Somebody accepts upon himself the burden of Torah. That means he's making Torah study the most important part of his life. He's making it the focus of why he's living. Then the burden of having to serve in the government or earn a livelihood is removed from him. There are times when the king would draft people into the army or into government service. Hashem will figure it out so that this person does not have to be brought into government service. Hashem is going to bless him with the ability to avoid that problem. Likewise, Hashem is going to bless him with parnasa. He's going to have success in the small amount of business dealings that he's focusing on. He's not going to have to work most of the day. He's not going to have to spend all of his time focused on a parnasa, but he'll have the ability to really focus on Torah. He's going to have that Beracha (blessing) from Shamayim (Heaven).
If somebody removes the burden of Torah from himself, that means he says, “You know what? I have time. I don't want to spend my time learning and focused on these sefarim (books). I'd rather spend my time making more money.” If that's the person's focus, what Hashem is going to do is flip it. That person thinks he has all the time in the world now because he's not learning Torah and he'll make money. Hashem is going to cause him to be drafted into the government, into the king's service. And even when he has time to work for himself, he's going to put a lot of effort in, but he's not going to reap the benefits. He's not going to make a lot of money. He's going to spend his time in misery. He's going to try as much as he can to make money, but he's never going to enjoy shalom, peace. So that's why a person needs to focus on the main priority of his day, being Torah learning, as opposed to anything else.