Despite external and internal forces working against them, successful people persist.
To be persistent simply means to stay with your goal, pursuing it with a focus and relentlessness that will not accept defeat or give up, until that desire is attained.
Things don't usually go as planned and nothing important has ever been accomplished without setbacks and difficulties, so note that and get ready when the inevitable roadblocks stand in your way.
I will persist until I succeed. Always will I take another step. If that is of no avail I will take another, and yet another. In truth, one step at a time is not too difficult. I know that small attempts, repeated, will complete any undertaking.- Og Mandino
So prepare for setbacks and obstacles by anticipating potential problems and have an emergency plan.
In conclusion, when you face an obstacle towards achieving your goal, think about three things:
Get around it, Get over it or Go through it.
Moving forward despite the challenges is probably the toughest thing to do.
Nice post mate.