这句话有没有语法错误,怎样改更地道

I always believe it true that for a man to have a solid economic basis is domestic assurance in the future .
I是主语 always believe是谓语 it是形式宾语 true是宾补
后面是that从句作真宾语是宾语从句
for a man to have a solid economic basis是动词不定式的复合结构 作宾语从句中的 主语 后面是宾从中的谓语 is domestic assurance in the future .

I always believe that it is true for a man to have a solid economic basis, which is an assurance of the future domestic.