Jesus's preaching marathon continues with almsgivings, prayer, and fasting. The next target is the hypocrite. Jesus is not a fan.
Jesus says, when giving alms, "do not let your left hand know what your right hand is doing" (6:3). That means being super discreet so no one can tell what you're doing. Like a magician.
About prayer, he says a similar thing. Jesus preaches against making a show of prayer for everyone to see and then teaches the Prayer of all Prayers; we know it now as The Lord's Prayer (You know the one: "Our Father…").
Things are no different for fasting. Basically, Jesus is not a fan of making a big spectacle about religious practice.
He goes on to speak against hoarding and says that the only treasures worth storing are the ones in heaven.
Then Jesus starts getting riddle-y by talking about eyes and lamps and light and darkness.
Basically, he's telling people to stay surrounded by good stuff because it'll influence you. But watch out, because bad stuff will do the same. Just in the wrong direction.
Jesus also preaches that a man cannot serve two masters. So make your choice: God or wealth?
Finally Jesus teaches his followers to just take a chill pill when it comes to worrying about the trivial things of life.
And the chapter concludes with one of the soundest pieces of advice: "Do not worry about tomorrow, for tomorrow will bring worries of its own. Today's trouble is enough for today" (6:34). That Jesus was ahead of his time.