Assets and Liabilities as Rich Dad, Poor Dad explains

I was reading "The rich dad poor dad by Robert Kiyosaki" here is a one point that he mentions on that.

Basically Asset as he says is little bit different than on books. If something puts money in your pocket it is a asset.
And Liabilities are the ones that takes money out of your pocket. OK for example a house or a car may seems like an Asset but it takes
money out of you pocket to maintain them. But if you rent them or make them to make money at the end of the day you can convert it
to a asset.
Basically that what rich people do. They buy assets.
Middle class buy liabilities (thinking those are assets) and stuff (a lot of them that not used or that not needed).
Lower class buy to consume (basic needs like foods).