Don’t tell someone they are wrong…they just get defensive and will not listen. Listen to what they have to say. They believe they are right as much as you believe you are right.
Share what you believe in a non-threatening way…at the right moment. Don’t try to convince…just share. By the way, sharing is not “preaching.”
Consider planting a garden. You place seed in the soil…you share. It takes time for seed to grow…sometimes, there is an abundant crop…sometimes, only some of the seed grows…sometimes, nothing!
It is the same with sharing. All you can do is plant the seed…and hope. The rest is beyond your pay grade. Plant from knowledge…share from the heart.