Letting things through is a gate's entire reason for being.

The entire reason for not simply giving up the planet is to maintain appearances.

In fact, it's the entire reason for me being here.

And all she need do is make her lover her entire reason for living.

Before he too had given himself over to the current, made riding the wave his entire reason for existing.

That seemed to be his entire reason for existing.

That is the entire reason I am in this wilderness?

That maybe that's the entire reason he was there?

This moment represented his entire reason for being in the United States.

"I think that's the entire reason for why our magic works this way," Peter continued.