It's even on the header of this blog.
"BE DILIGENT TO PRESENT YOURSELF APPROVED TO GOD, A WORKER WHO DOES NOT NEED TO BE ASHAMED, RIGHTLY DIVIDING THE WORD OF TRUTH." 2 TIM 2:15.
Be diligent. Effort is required. Exertion is implied.
Be diligent. Involves earnest endeavour.
Make effort, exert earnest endeavour to study, and to do so with haste. Don't waste time.
It's not being laid back. It's not being apathetic. It doesn't mean just waiting for something to happen.
Not at all.
It means to be forward, to be pro-active, to be intentional.
It means that words aren't enough. Actions need to back the words.
It means being diligent.