I don't know where this path would lead me to but would you ride with me? 

I agree we never know where destiny takes us the quote makes us think if we dont know where this ride leads to, would you still stay if anything or problem in that bumpy road(problems) 

It relates people that will get challenge with problems that trys out their loyalty if in the long run for better or worst would he/she would stay or leave. 

The quote means in tha long run we don't know what speed bump or rocky roads of problems would you still continue to drive forward and stay. 

This applies to people to move forward and make them be brave and stay strong and move forward and get out from their comfort zone

This makes us realize to have to get out of comfort zone and be brave in the long run and move forward if where this road takes us and how risky it is we have to drive and make it happen.