This is the message you heard from the beginning: We should love one another.
Romans 8:35-37
Who shall separate us from the love of Christ? Shall trouble or hardship or persecution or famine or nakedness or sword? No, in all these things we are more than conquerors through him who loved us.
1 John 4:11-12
Dear friends, since God so loved us, we also ought to love one another. No one has ever seen God; but if we love one another, God lives in us and his love is made complete in us.