We were taught that we should be strong in what someone is saying that the "rightly divided" bible says. If they are teaching "God's Word" then we are to be strong in what they say.
I don't believe this is true at all about being strong in the Lord. More like nearly the opposite, be strong in the spirit of your mind, the scriptures say. I think this is the key, you, your spirit, God is big enough to work with you. Sure, we can listen and hear what others say, but it should always be you, your spirit with the say on anything for you. And then you don't go trying to force feed it to someone else. Let them work with their own spirit.
Does this make sense to anybody? I may not have said it well.