What one of the greatest gifts from God to me as a Christian, that I have come to understand in my later years of life is a "peace that passes all understanding."
"And the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus." -Philippians 4:7 [ESV Study Bible]
Whenever a loss, struggle or some negative issue has come up in my life, I've noticed this peaceful quiet within myself. This isn't to say, I don't cry or grieve at a loss or struggle with a problem but it is to say that a peace which does "pass all understanding" is there to get me through it all.