Jesus lives the example that the path to salvation is narrow and lonesome when He encounters doubters among His siblings, and haters among the holy rollers.
A non-Red Letter Scripture in the Bible says, "A friend loves@all times, and a brother is born for adversity." (Proverbs 17: 17). I like that verse because although it's not a quote of Christ it's a brilliant statement IMHO; because it's also a double entendre. A brother can be your hero and your bully, but can only truly also be a friend if/when they love at all times; the way your dearest friends do.