One's heart is already either in God, or anywhere else.
Eventually, the rest of you will catch up.

Sometimes, people hear a very succinct argument.
If you don't like blue, it just might happen that you chance across someone who explains how you can make blue look good and your house over the next few months slowly gets sadder (turns blue )because this person's argument changed your oppinion.

However, it might also be the case that no matter how deft a person's arguments, you will never be persuaded because you aren't relying on reason, you simply find the reason to match your heart's persuit.
That is to say, many people have their heart buried very deeply in God yet they're for some time a long way away, the only connection an invisible thread. As they slowly dig and dig, following this thread, they will move to wherever they were always going to end up, no matter where they started from.

Likewise, one's heart might be buried in the roots of, for instance, evolution.
Even if a scientist disproved evolution, this person would only try to find more reasons, make more theories and dig further away from God because they only believe in evolution out of their unbelief in God.

You see, not always, people only believe things because they don't believe something else, not because of any argument or 'fact'.
If you take away their facts, they resist falling into darkness by jumping to another one, but never God, because for some people, it's not about convincing evidence leading to belief, it's finding evidence for their belief.

I'm not sure how to finish this.