、。
A good son always wants to please his parents.
Literal
Good son [quotative-というもの-は], always one's-own [of-の] parents [object-を] please-want [quotative-と] is-thinking.
~というもの ('the thing that is called X, the kind of thing X is') is a nominalization used for defining or generalizing. 喜ばせる is the causative of 喜ぶ ('to be pleased') — 'to cause to be pleased' = 'to please.' 自分の reflexive possessive.