It's such a common phrase that we casually use yet most of the time failing to understand its gravity. Right now, the world demands instant gratification. No one wants to wait. No one has the time to wait. Waiting means foolishness. But here's a quote I saw few years ago:
"If you want to know how to be successful, think like a farmer. A farmer knows that he can not expect a harvest if he has not sown any seeds"
A lot of us see the harvest and the price at the end. Our eyes glued to what is to come failing to look down on what needs to be done.
Don't get me wrong, there's nothing wrong with "eyes on the prize" but let me remind of this verse found in Psalm 119:105
"Your word is a lamp unto my feet and a light unto my path"
The WORD wants us to see what's ahead but the WORD also encourages us to where we are and know how to get there.
Galatians 6:7 says "A man reaps what he sows."
God believes in process. He even went from Day 1 to Day 6 before resting.
That dream can happen. That aspiration can be achieved. But you got to start sowing seeds now. Be it through training, additional learning, accepting rebukes, volunteering, stepping out in faith or whatever that God specifically asks you to do.
Just sow...you'll reap it someday. Never never quit.