We hurt each other when we project our way of seeing God onto all of His reality. As if we speak for Him. We never speak for Him; He speaks for Himself. Through His Word, and into the spirits of those that He made, especially those who love and know Him.
We err, I think, when we take words received from Him, meant for us alone, and project them onto everyone.
The Lord may have told one in the body not to eat meat, one not to miss church, one to only pray in their prayer language. We hurt each other when we impose these words spoken to us on our brothers, as these things may not be part of the reality that God made for them.
We are not allowed to pick and choose which parts of His Word we are to follow, but "words" from the Lord are, I believe, given to us alone. They are for our edification, for our obedience, for our worship and focus. Please God, do not let us beat our brothers over the head with them.