What can other people know of the condition of one's heart?

Found the following quote by Sant Kirpal Singh Ji on facebook. It brought back a flood of emotion to me, as this profoundly hopeful statement by Him (perhaps in a different form, but this sentiment) was like a lifeline to me so many years ago in the most difficult times of my life.

And seeing it again, I realize that it still has the same effect.        jesse s. hanson

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What can other people know of the condition of one's heart? If ...