How would you reword this sentence to make it easier to understand?

Question

In other words, giving up results in goals much harder to achieve, thus persevering really makes a difference.

Answer 1

First of all, it's not a complete sentence without a main verb.

Next, try something like this:

It's better to ... than to ...

Answer 2

I can't use contractions or "to be" verbs in my essays.

Answer 3

I don't understand what you're trying to say in that sentence.

Persevering brings more satisfaction than giving up your goals.