Sometimes when those of us who are exerting great effort to live a Holy life in order to please the LORD and it seems that someone else does not, we don’t know how to react to that person. We don’t know if we should associate with them or what we could do as far as our actions and keep the peace between us and the God we are endeavoring to serve.
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Often we forget that the foundation of Christian living is LOVE. Even in thinking of love we might still be bum-fuzzled because we are trying to love Jesus FIRST! This brings on, though we may not want to admit it, a hypocritical response, as though we are above sin, and have never had to have  our sins forgiven.
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The scripture makes plain that our LORD came into this world to save mankind. This meaning that mankind was not already saved, but while we were all sinners Jesus came into this world to die for the mess we were making. Treat others like this, before you judge their sin, love them.