Solomon said, “The heart knows its own bitterness, and no stranger shares its joy” (Proverbs 14:10).

Longfellow observed, “Every man has his secret sorrows which the world knows not; and often times we call a man cold when he is only sad.”

Pastor John Watson (pen name Ian Maclaren) counseled, “Be kind, for everyone you meet is fighting a hard battle.”

“So, as those who have been chosen of God, holy and beloved, put on a heart of compassion, kindness, humility, gentleness and patience” (Colossians 3:12, NASB).