Depending on your strength and endurance you can only go fast for a certain time. Thereafter you will be tired and wearied. You will slows down. The tasks that lies ahead seems impossible to achieve on your own strength. Many people when they have reached this point in their life, projects, business or missions, would give up and lost the "battle". This is where you need to find other people to support and go together with you on the journey.
You need another person to be there to motivate each other. When you fall down, the other person can help you up and encourage you to continue on. If you know that the ministry would be long and far, do find someone to go together with you. Then you will go further than if you are alone.
If you want to go far, go together.