There are times you will come across people that are not ready to hear what you know to be the truth. Don't feel it is your responsibility that they hear it from you.
When they are ready to accept this information, the right person will speak it to them. Sometimes people need to hear it many times before they believe it.
Don't underestimate the power of planting a seed. Some of what you say will be absorbed and stored for later.
It is only your responsibility to be open and willing to share. You are not responsible for everyone to accept it!