That's a good way to put it.

Why this comparison..?

If I want to make a cup of tea, but I only leave the teabag in for a second, it will make a really weak cup of tea. If I only spend a little time each day or each week or month in God's word (or not at all), it's likely that my faith will be just like that weak cup of tea.

Ah got it

But what happens when the bag starts to fall apart?

You get a new teabag or a new Bible and wear them out as well.