Question

Expansion of ideas when going gets tough, tough gets going

Answer 1

In context, "the going" means "the situation," "gets tough" means "becomes difficult," "the tough" means "people who are strong or enduring," and "get going" means "become fully engaged." Taken together, the meaning of the phrase is "When the situation becomesdifficult, the strong will become engaged."

Answer 2

It means, when situations become hard to deal with, the strong who have been through pain and can handle it will rise.