Here are a couple of incidences where we are commanded to be edified by other people and their beliefs:
- Proverbs 3:1 - "My son, do not forget my teaching, but let your heart keep my commandments,"
- 1 Corinthians 11:1 - "Be imitators of me, as I am of Christ."
- Hebrews 10:24-25 - "And let us consider how to stir up one another to love and good works, not neglecting to meet together, as is the habit of some, but encouraging one another, and all the more as you see the Day drawing near."
So, while I agree that you can't just believe something because others believe it. I also believe that, if others are abiding in the Word, you need to have them in your life, preaching Truth to you. And, at times, you need to make other people's faith your own.