"But how do I know what is really best?"

- The answer is simple. It doesn't matter. What matters is not the choice you make, but rather the intention behind your choice. What matters is that whatever decision you make, you are clear in your intention of choosing based on what's best for all. If it later turns out that you made what appears to have been a bad choice, there's no need for guilt. Knowing that you did your best to choose with a sincere desire for what's best for all, your conscience stays clear and open. This then allows you to more easily learn from your mistakes, and to live with a clear heart and mind