how to understand "if a man empities his purse into his hesd,no one can take it from him"

"If a man empties his purse into his head, no one can take it from him."
Benjamin Franklin 说的。
"如果一个人倾其所有以求学问，那么这些学问是没有人能拿走的。"

如何了解：“如果一个人将他的财富装到他的脑袋里，没有人可以从他身上将他拿走”。

就是说一个人如果注意丰富自己的知识学问，而不是金钱的话，那么就有不会消失的财富。

if a man learns knowledge truely, no one can take it away form him.